Signal processing method and apparatus

ABSTRACT

The present disclosure relates to signal processing methods and apparatus. One example method includes determining a first sequence {x(n)} based on a preset condition, generating a reference signal of a first signal by using the first sequence, and sending the reference signal on a first frequency-domain resource. The preset condition is 
     
       
         
           
             
               
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     a length of the first sequence is K=6, n=0, 1, . . . , K−1, A is a non-zero complex number, and j=√{square root over (−1)}. The first signal is a signal modulated by using π/2 binary phase shift keying (BPSK). The first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, k=u+L*n+delta, L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, and subcarrier numbers of the K subcarriers are numbered in ascending or descending order of frequencies.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.17/362,065, filed on Jun. 29, 2021, which is a continuation ofInternational Application No. PCT/CN2020/071476, filed on Jan. 10, 2020,which claims priority to Chinese Patent Application No. 201910114674.7,filed on Feb. 14, 2019, which claims priority to Chinese PatentApplication No. 201910024591.9, filed on Jan. 10, 2019. All of theaforementioned patent applications are hereby incorporated by referencein their entireties.

TECHNICAL FIELD

This application relates to the communications filed and, morespecifically, to a signal processing method and apparatus.

BACKGROUND

In a long term evolution (LTE) system, for a physical uplink sharedchannel (PUSCH) and a PUCCH, a demodulation reference signal (DMRS) isused for channel estimation, and then a signal is demodulated. In theLTE system, a base sequence of an uplink DMRS may be directly mapped toa resource element, and no encoding processing is needed. In LTE, areference sequence of the uplink DMRS is defined as a cyclic shift of abasic sequence. The base sequence of the uplink DMRS is obtained from aZadoff-Chu sequence (ZC sequence) through cyclic extension. The ZCsequence is a sequence that satisfies a constant envelope zeroauto-correlation (CAZAC) sequence property.

In a new radio access technology (NR), an uplink transmission signal issupported to use a discrete Fourier transform-spread-orthogonalfrequency division multiplexing (discrete Fourier Transform spread OFDM,DFT-s-OFDM) waveform. The uplink transmission signal is modulated byusing π/2 Binary Phase Shift Keying (BPSK). In addition, afrequency-domain filtering operation may be on an uplink transmissionsignal obtained after DFT transform. When the uplink transmission signalis modulated by using π/2 BPSK, a Gold sequence-based sequence may beused, or a computer generated sequence (CGS) may be used. Currently, itis planned to support, in NR, a DMRS using the DFT-s-OFDM waveform touse the ZC sequence. In addition, it is planned to support, in NR, aDMRS of the uplink transmission signal modulated by using π/2 BPSK touse the ZC sequence.

However, if the uplink DMRS uses the ZC sequence, a peak-to-averagepower ratio (PAPR) of the DMRS is higher than a PAPR of a correspondinguplink transmission signal, resulting in out-of-band spurious emissionand in-band signal loss of the DMRS and affecting channel estimationperformance, or limiting uplink coverage. In addition, when the uplinkDMRS using the DFT-s-OFDM waveform is modulated by using the π/2 BPSKmodulation scheme, and a filter is used, if the uplink DMRS using theDFT-s-OFDM waveform uses the Gold sequence-based sequence or the CGS andproper screening cannot be performed, frequency flatness of the sequenceis relatively poor. This is adverse to channel estimation. If the uplinkDMRS using the DFT-s-OFDM waveform uses the ZC sequence, apeak-to-average power ratio (PAPR) of the DMRS is higher than a PAPR oftransmitted data, resulting in out-of-band spurious emission and in-bandsignal loss of a pilot signal and affecting channel estimationperformance, or limiting uplink coverage.

That is, an existing DMRS sequence cannot satisfy a currentcommunications application environment. In addition, an existingsequence used by a reference signal (for example, a DMRS) used for aPDSCH cannot satisfy the current communications application environmentin which a signal is sent through a PUSCH.

SUMMARY

This application provides a signal processing method and apparatus, toimprove communication efficiency.

According to a first aspect, a signal processing method is provided. Themethod includes:

generating a reference signal of a first signal, where the first signalis a signal modulated by using π/2 binary phase shift keying BPSK, thereference signal is generated by using a first sequence, and a length ofthe first sequence is K; and

sending the reference signal on a first frequency-domain resource, wherethe first frequency-domain resource includes K subcarriers each having asubcarrier number of k, k=u+L*n+delta, n=0, 1, . . . , K−1, L is aninteger greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is aninteger, and the subcarrier numbers are numbered in ascending ordescending order of frequencies, where

before the reference signal is generated, the method further includes:

determining the first sequence, where the first sequence varies as adelta value varies.

In some possible implementations, a modulation scheme of the firstsequence is neither BPSK modulation nor pi/2 BPSK modulation.

In some possible implementations, the first sequence is a sequencemodulated by using any one of 8PSK, 16PSK, or 32PSK.

In some possible implementations, the method further includes:

determining the first sequence in a first sequence group, where thefirst sequence group is one of a plurality of sequence groups, and thefirst sequence is determined, based on the delta value, in a pluralityof sequences that are in the first sequence group and whose length is K.

In some possible implementations, the method further includes:

determining the first sequence group based on a cell identifier or asequence group identifier.

In some possible implementations, the method further includes:

receiving indication information, where the indication information isused to indicate a sequence that is in each of at least two sequencegroups and used to generate the reference signal.

With reference to the first aspect, in some implementations of the firstaspect,

optionally, when delta=0, the generating a reference signal of a firstsignal includes:

performing discrete Fourier transform on elements in a sequence {z(t)}to obtain a sequence {f(t)} with t=0, . . . , L*K−1, where when t=0, 1,. . . , L*K−1, z(t)=x(t mod K), and x(t) represents the first sequence;and

mapping elements numbered L*p+delta in the sequence {f(t)} to thesubcarriers each having the subcarrier number of u+L*p+deltarespectively, to generate the reference signal, where p=0, . . . , K−1.

Optionally, when L=2 and delta=1, the generating a reference signal of afirst signal includes:

performing discrete Fourier transform on elements in a sequence {z(t)}to obtain a sequence {f(t)} with t=0, . . . , L*K−1, where when t=0, . .. , K−1, z(t)=x(t), when t=K, . . . , L*K−1, z(t)=−x(t mod K), and x(t)represents the first sequence; and

mapping elements numbered L*p+delta in the sequence {f(t)} to thesubcarriers each having the subcarrier number of u+L*p+deltarespectively, to generate the reference signal, where p=0, . . . , K−1.

In an embodiment, L may alternatively be another integer greater than 2.In other words, when delta=1, the generating a reference signal of afirst signal includes: performing discrete Fourier transform on elementsin a sequence {z(t)} to obtain a sequence {f(t)} with t=0, . . . ,L*K−1, where when t=0, . . . , K−1, z(t)=x(t), when t=K, . . . , L*K−1,z(t)=−x(t mod K), and x(t) represents the first sequence; and mappingelements numbered L*p+delta in the sequence {f(t)} to subcarriers eachhaving the subcarrier number of u+L*p+delta respectively, to generatethe reference signal, where p=0, . . . , K−1.

Optionally, when L=4, the generating a reference signal of a firstsignal includes:

performing discrete Fourier transform on elements in a sequence {z(t)}to obtain a sequence {f(t)} with t=0, . . . , 4K−1, where when t=0, 1, .. . , 4K−1,

${{z(t)} = {{w_{delta}\left( \left\lfloor \frac{t}{K} \right\rfloor \right)}{x\left( {t\mspace{14mu}{mod}\mspace{14mu} K} \right)}}},$

where w₀=(1, 1, 1, 1), w₁=(1, j, −1, −j) w₂=(1, −1, 1, −1), w₃=(1, −j,−1, j), └c┘ represents rounding down of c, and x(t) represents the firstsequence; and

mapping elements numbered 4p+delta in the sequence {f(t)} to thesubcarriers each having the subcarrier number of u+L*p+deltarespectively, to generate the reference signal, where p=0, . . . , K−1.In another embodiment, w₀=(1, 1, 1, 1), w₁=(1, j, −1, −j), w₂=(1, −1, 1,−1), and w₃=(1, −j, −1, j).

Optionally, the generating a reference signal of a first signalincludes:

performing discrete Fourier transform on elements in a sequence {x(t)}to obtain a sequence {f(t)} with t=0, . . . , K−1, where x(t) representsthe first sequence; and

mapping elements numbered p in the sequence {f(t)} to the subcarrierseach having the subcarrier number of u+L*p+delta respectively, togenerate the reference signal, where p=0, . . . , K−1.

Optionally, when delta=0, the method further includes:

determining the first sequence {x(n)} based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −5, 5, 11, −13, 11}, {1, −5, 3, 13, 3, −5}, {1, −5, 5, 13, 5, 11},{1, −9, −5, 5, 15, 11}, {1, 9, −15, 11, −13, 11}, {1, 9, −15, 11, 3,11}, {1, 11, −11, −9, 13, 3}, {1, −7, 7, 15, 11, 15}, {1, −9, −1, −5,−15, −7}, {1, −13, −9, −15, −5, 7}, {1, −1, 7, 15, 3, 11}, {1, 9, −15,15, −9, 11}, {1, 15, 7, −5, −11, −9}, {1, 11, 15, −3, −13, 5}, {1, 9,−15, 15, 7, 15}, {1, 9, −15, 9, 7, 15}, {1, −11, −3, 11, −15, 13}, {1,11, 1, 5, −9, −9}, {1, −3, 9, −1, −15, −11}, {1, 15, −13, 7, −5, −9},{1, 11, −3, 3, 1, −9}, {1, −11, −13, 9, −13, −3}, {1, −11, −7, 3, 13,3}, {1, −11, 11, −11, −7, 3}, {1, −11, −15, −9, 3, 11}, {1, 15, 5, −9,−7, −9}, {1, 11, 15, 9, −1, −11}, {1, −11, −1, −5, 5, 11}, {1, 7, −5, 5,15, 11}, or {1, 11, 3, 13, −13, 15}; or

{1, −11, 11, −1, 7, 13}, {1, −3, −13, 15, −5, 5}, {1, −11, 11, −1, 3,13}, {1, 13, −9, 3, −3, −13}, {1, −11, 11, −1, 7, 13}, {1, −3, 9, −13,−1, −9}, {1, 11, 13, 1, −9, 11}, {1, 11, −9, 13, 7, 5}, {1, 3, −9, 13,1, 11}, {1, 11, −9, 15, 7, 5}, {1, −11, −3, 5, 7, −5}, {1, 7, −15, 5,−5, 15}, {1, −5, −15, −3, 7, −13}, {1, 9, 13, 1, −9, 11}, {1, −7, −11,1, 11, −9}, {1, 9, −3, −13, 7, 11}, {1, 11, −9, −13, 13, 5}, {1, −9,−15, −3, 7, −13}, {1, −11, −9, 1, 7, −5}, {1, 9, −3, −13, 7, 9}, {1, 13,11, 3, −5, 7}, {1, 13, 9, 1, −5, 7}, {1, 9, 15, 3, −7, 13}, {1, −7, 5,13, −7, −15}, {1, 1, 9, −3, −11, 9}, {1, −11, −5, 1, 7, −5}, {1, −5,−11, 1, 11, −9}, {1, −9, 1, 11, −9, −15}, {1, 13, −9, 1, −5, −15}, {1,−5, 7, −15, −5, −15}, {1, −9, 11, −15, −15, −5}, {1, −9, −15, −5, 5,−15}, {1, −9, 13, −13, −3, −3}, {1, −9, 13, 1, 1, 11}, {1, −9, 1, 1, 7,−5}, {1, −11, −15, −3, 7, −13}, {1, −11, −13, −1, 9, −11}, {1, 3, 15,−13, 7, −3}, {1, −11, −7, 5, 7, −5}, {1, 11, 11, 1, −9, 9}, {1, 15, 7,−3, −3, 7}, {1, −9, 13, 13, −9, −1}, {1, 11, 11, 1, −7, 7}, {1, −11, −3,3, −9, −5}, {1, 7, 15, 3, −7, −3}, {1, 11, 7, −13, 13, 5}, {1, 13, 5,−1, 11, 7}, {1, −11, −3, 1, 7, −5}, {1, −11, −5, −1, 7, −5}, {1, −3,−11, 1, 11, −9}, {1, 13, −9, 3, −5, −9}, {1, 11, −1, −11, 9, 15}, {1,11, 13, −13, 7, −3}, {1, 11, −9, −15, 15, 5}, {1, 11, −9, 13, 11, 5},{1, −11, −3, 5, −7, −5}, {1, −7, −15, −3, 7, 5}, {1, −7, −15, −3, −5,5}, {1, −9, −7, 13, −11, −3}, {1, −7, −15, −15, −5, 5}, {1, 11, 11, 3,−5, 7}, {1, 13, −9, 1, −7, −15}, {1, 9, 9, −1, −11, 9}, {1, −9, −9, −1,7, −5}, {1, −9, −1, 7, 7, −5}, {1, −9, 13, 1, 1, 9}, {1, 13, 13, 5, −3,7}, {1, 15, 7, −1, −3, 7}, {1, 11, 9, 1, −7, 7}, {1, −9, −7, 1, 9, −5},{1, 3, −7, 15, 1, 9}, {1, −9, −15, −3, 5, −15}, {1, −5, −15, −15, −3,5}, {1, 1, 11, −15, 5, −3}, {1, −7, 13, −13, −3, −3}, {1, −7, 3, 13, −7,−15}, {1, −7, 5, 15, −7, −15}, {1, −9, 13, −11, −11, −3}, {1, −11, −3,−3, 5, −5}, {1, −11, −3, 3, −9, 13}, {1, −11, −7, 1, −11, −5}, {1, −7,−11, 1, 11, 5}, {1, −3, −11, 1, 11, 5}, {1, −11, −3, 1, −11, −5}, {1,11, 15, −13, 7, −3}, {1, 7, 15, 3, 7, −3}, {1, −9, −3, −15, −11, −3},{1, 5, 15, 3, −7, 13}, {1, 11, 7, −13, 11, 5}, {1, −9, −3, −15, −7, −3},{1, −3, −11, 1, −5, 5}, {1, −7, −11, 1, −5, 5}, {1, −3, 9, −13, −1,−11}, {1, −9, 3, 13, −7, −11}, {1, 13, 7, −1, 11, 7}, {1, −5, −11, 1,11, 5}, {1, −11, −5, 1, −11, −5}, {1, −9, −3, −15, −9, −3}, {1, −5, −11,1, −5, 5}, {1, 11, −11, 1, −5, −15}, {1, −9, −15, −3, 7, −15}, {1, 11,11, 1, −9, 11}, {1, 1, 11, −15, 5, −5}, {1, 9, 11, −1, −11, −3}, {1, 11,3, 15, 7, 5}, {1, 3, 11, −1, 7, −3}, {1, −7, 5, −3, 7, −13}, {1, −9,−11, 1, 11, 5}, {1, −1, −11, 1, 11, 5}, {1, −11, −9, 1, −11, −5}, {1,11, −1, −11, −5, 15}, {1, −11, −1, 1, −11, −5}, {1, −9, −3, −15, −5,−3}, {1, −1, −11, 1, −5, 5}, {1, −9, −11, 1, −5, 5}. It should beunderstood that {x(n)} represents {x_(n)}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −7, 13, −13, −11, −3}, {1, −7, −9, −15, −3, 5}, {1, 5, 15, −15, 5,−3}, {1, 13, 11, 1, −3, 9}, {1, 11, 3, 15, 11, 5}, {1, −11, −3, 3, −9,−5}, {1, −11, −3, 3, −9, 13}, {1, −7, 3, 15, 11, 5}, {1, −3, 7, −13, 9,5}, {1, 11, 7, −13, 9, 5}, {1, 13, −9, 1, −9, −15}, {1, −9, 13, 1, 1,7}, {1, 3, 11, −1, −11, −3}, {1, 3, 11, −1, 7, −3}, {1, 9, −1, 7, 9,−3}, {1, 11, −11, 13, 15, −7}, {1, −7, 3, −5, −3, 7}, {1, 9, 7, −3, 5,−5}, {1, 13, 15, 7, −3, 5}, {1, −7, 3, 11, 9, −3}, {1, 13, −7, −5, −15,−7}, {1, −7, 13, 15, −3, 3}, {1, −13, −15, −3, 5, −9}, {1, 15, 11, −1,11, 7}, {1, −3, 11, 7, −5, 5}, {1, −13, −9, 3, −7, −3}, {1, 7, 7, −5,−15, −3}, {1, 11, 1, 11, −11, −9}, {1, −5, 5, −7, −11, 9}, or {1, −9, 1,3, −3, 7}; or

{1, 9, −15, −7, −15, 9}, {1, −5, 3, 13, −13, 11}, {1, 11, −13, 13, 3,−5}, {1, −5, 1, 9, −13, 11}, {1, −5, 5, 11, −13, 9}, {1, −7, −13, 9, 15,−9}, {1, −7, 3, 11, −15, 11}, {1, −9, −3, −9, −1, 9}, {1, 9, 3, 9, −1,−9}, {1, −5, −13, 9, −15, −9}, {1, −5, −13, 9, 15, −9}, {1, −5, −15, 9,15, −9}, {1, −9, 15, 9, −13, −5}, {1, −9, −15, 9, −13, −5}, {1, −7, 15,9, −13, −5}, {1, −9, −5, 5, 15, 11}, {1, 11, 15, 5, −5, −9}, {1, −7,−15, 9, −13, −5}, {1, −7, 1, 9, −15, 11}, {1, 9, −15, −7, −15, 11}, {1,9, −15, −7, −13, 11}, {1, −7, −15, 9, 15, −9}, {1, −5, −13, −5, 3, 11},{1, −7, −13, −5, 3, 11}, {1, 9, −15, 9, −1, −7}, {1, −5, 1, −11, 15,−7}, {1, −5, 5, 15, −13, 11}, {1, 9, −13, 15, 5, −5}, {1, 9, 5, −5, −15,−9}, {1, 9, −1, −11, −15, −9}, {1, 9, 15, 5, −5, −9}, {1, −9, −1, 9, 15,11}, {1, −5, 3, 13, 7, −5}, {1, −9, 15, −13, −3, 7}, {1, 7, −3, −13, 15,−9}, {1, −7, −1, −13, 15, −7}, {1, 9, −13, 15, 3, 9}, {1, 9, 5, −5, −15,−7}, {1, 9, −1, −11, −15, −7}, {1, 5, −9, −15, −3, 7}, {1, −13, −9, −15,−5, 7}, {1, −5, 7, 15, 9, 15}, {1, −5, 3, 15, 9, −5}, {1, 9, 15, 9, −3,−11}, {1, 11, 7, 11, −3, −11}, {1, −11, −5, −11, −3, 9}, {1, −7, 3, 15,11, −3}, {1, 9, 3, 9, −3, −11}, {1, 11, 3, 7, −7, −11}, {1, 7, 15, −5,−13, 7}, {1, −3, 7, −13, 11, −3}, {1, 11, 3, −9, −15, −9}, {1, −9, −15,−3, 3, 11}, {1, 11, 5, −7, −1, −9}, {1, 7, −5, −11, −1, 9}, {1, −7, 3,13, −13, 13}, {1, −9, 13, −11, −5, 7}, {1, 9, 15, 7, −3, −11}, {1, 11,15, 9, −3, −11}, {1, 11, 3, −7, −15, −7}, {1, 11, 1, −9, −15, −5}, {1,11, 3, −9, −15, −7}, {1, 11, 5, 9, −3, −11}, {1, 7, 15, 7, −3, −11}, {1,11, 5, −5, −15, −5}, {1, 11, 5, −7, −15, −7}, {1, −11, −7, −11, −1, 11},{1, 11, 7, 11, −1, −11}, {1, 11, 15, 11, −1, −11}, {1, −11, −15, −11,−1, 11}, {1, 9, −15, 9, 5, −5}, {1, −7, −13, 11, −13, −5}, {1, 9, −15,9, 3, −5}, {1, 5, 3, 11, −11, 13}, {1, −9, −13, 11, −13, −5}, {1, −7, 3,11, −13, 13}, {1, −7, 3, 11, −13, 11}, {1, −7, −1, 7, −13, 11}, {1, −11,13, −9, −1, −3}, {1, −7, 1, 7, −13, 11}, {1, 11, −13, 13, 1, −7}, {1,−7, 13, 7, −15, −7}, {1, −11, −7, −13, −3, 9}, {1, 11, −13, 11, −1, −7},{1, 5, 15, −5, −13, 7}, {1, 11, 3, −7, −15, −5}, {1, 11, 1, −9, −15,−7}, {1, −9, 13, −9, −1, 7}, {1, −11, −15, −5, 1, 11}, {1, −11, −15, −9,1, 11}, {1, 11, 7, −5, −15, −5}, {1, 11, 5, 9, −1, −11}, {1, −9, −5,−11, −1, 11}, {1, 9, −15, −9, 13, 11}, {1, 7, 3, −9, 13, −9}, {1, 9, 15,−9, 13, 11}, {1, 7, 15, −9, 13, 11}, {1, −9, −15, −5, 3, 11}, {1, 11, 5,−5, −15, −7}, {1, 11, 3, −7, −1, −9}, or {1, 7, −3, −11, −1, 9}.

Optionally, when delta=0, the method further includes:

determining the first sequence based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −5, 5, 11, −13, 11}, {1, −5, 3, 13, 3, −5}, {1, −5, 5, 13, 5, 11},{1, −9, −5, 5, 15, 11}, {1, 9, −15, 11, −13, 11}, {1, 9, −15, 11, 3,11}, {1, 11, −11, −9, 13, 3}, {1, −7, 7, 15, 11, 15}, {1, −9, −1, −5,−15, −7}, {1, −13, −9, −15, −5, 7}, {1, −1, 7, 15, 3, 11}, {1, 9, −15,15, −9, 11}, {1, 15, 7, −5, −11, −9}, {1, 11, 15, −3, −13, 5}, {1, 9,−15, 15, 7, 15}, {1, 9, −15, 9, 7, 15}, {1, −11, −3, 11, −15, 13}, {1,11, 1, 5, −9, −9}, {1, −3, 9, −1, −15, −11}, {1, 15, −13, 7, −5, −9},{1, 11, −3, 3, 1, −9}, {1, −11, −13, 9, −13, −3}, {1, −11, −7, 3, 13,3}, {1, −11, 11, −11, −7, 3}, {1, −11, −15, −9, 3, 11}, {1, 15, 5, −9,−7, −9}, {1, 11, 15, 9, −1, −11}, {1, −11, −1, −5, 5, 11}, {1, 7, −5, 5,15, 11}, or {1, 11, 3, 13, −13, 15}; or

{1, 9, −15, −7, −15, 9}, {1, −5, 3, 13, −13, 11}, {1, 11, −13, 13, 3,−5}, {1, −5, 1, 9, −13, 11}, {1, −5, 5, 11, −13, 9}, {1, −7, −13, 9, 15,−9}, {1, −7, 3, 11, −15, 11}, {1, −9, −3, −9, −1, 9}, {1, 9, 3, 9, −1,−9}, {1, −5, −13, 9, −15, −9}, {1, −5, −13, 9, 15, −9}, {1, −5, −15, 9,15, −9}, {1, −9, 15, 9, −13, −5}, {1, −9, −15, 9, −13, −5}, {1, −7, 15,9, −13, −5}, {1, −9, −5, 5, 15, 11} {1, 11, 15, 5, −5, −9}, {1, −7, −15,9, −13, −5}, {1, −7, 1, 9, −15, 11}, {1, 9, −15, −7, −15, 11}, {1, 9,−15, −7, −13, 11}, {1, −7, −15, 9, 15, −9}, {1, −5, −13, −5, 3, 11}, {1,−7, −13, −5, 3, 11}, {1, 9, −15, 9, −1, −7}, {1, −5, 1, −11, 15, −7},{1, −5, 5, 15, −13, 11}, {1, 9, −13, 15, 5, −5}, {1, 9, 5, −5, −15, −9},{1, 9, −1, −11, −15, −9}, {1, 9, 15, 5, −5, −9}, {1, −9, −1, 9, 15, 11},{1, −5, 3, 13, 7, −5}, {1, −9, 15, −13, −3, 7}, {1, 7, −3, −13, 15, −9},{1, −7, −1, −13, 15, −7}, {1, 9, −13, 15, 3, 9}, {1, 9, 5, −5, −15, −7},{1, 9, −1, −11, −15, −7}, {1, 5, −9, −15, −3, 7}, {1, −13, −9, −15, −5,7}, {1, −5, 7, 15, 9, 15}, {1, −5, 3, 15, 9, −5}, {1, 9, 15, 9, −3,−11}, {1, 11, 7, 11, −3, −11}, {1, −11, −5, −11, −3, 9}, {1, −7, 3, 15,11, −3}, {1, 9, 3, 9, −3, −11}, {1, 11, 3, 7, −7, −11}, {1, 7, 15, −5,−13, 7}, {1, −3, 7, −13, 11, −3}, {1, 11, 3, −9, −15, −9}, {1, −9, −15,−3, 3, 11}, {1, 11, 5, −7, −1, −9}, {1, 7, −5, −11, −1, 9}, {1, −7, 3,13, −13, 13}, {1, −9, 13, −11, −5, 7}, {1, 9, 15, 7, −3, −11}, {1, 11,15, 9, −3, −11}, {1, 11, 3, −7, −15, −7}, {1, 11, 1, −9, −15, −5}, {1,11, 3, −9, −15, −7}, {1, 11, 5, 9, −3, −11}, {1, 7, 15, 7, −3, −11}, {1,11, 5, −5, −15, −5}, {1, 11, 5, −7, −15, −7}, {1, −11, −7, −11, −1, 11},{1, 11, 7, 11, −1, −11}, {1, 11, 15, 11, −1, −11}, {1, −11, −15, −11,−1, 11}, {1, 9, −15, 9, 5, −5}, {1, −7, −13, 11, −13, −5}, {1, 9, −15,9, 3, −5}, {1, 5, 3, 11, −11, 13}, {1, −9, −13, 11, −13, −5}, {1, −7, 3,11, −13, 13}, {1, −7, 3, 11, −13, 11}, {1, −7, −1, 7, −13, 11}, {1, −11,13, −9, −1, −3}, {1, −7, 1, 7, −13, 11}, {1, 11, −13, 13, 1, −7}, {1,−7, 13, 7, −15, −7}, {1, −11, −7, −13, −3, 9}, {1, 11, −13, 11, −1, −7},{1, 5, 15, −5, −13, 7}, {1, 11, 3, −7, −15, −5}, {1, 11, 1, −9, −15,−7}, {1, −9, 13, −9, −1, 7}, {1, −11, −15, −5, 1, 11}, {1, −11, −15, −9,1, 11}, {1, 11, 7, −5, −15, −5}, {1, 11, 5, 9, −1, −11}, {1, −9, −5,−11, −1, 11}, {1, 9, −15, −9, 13, 11}, {1, 7, 3, −9, 13, −9}, {1, 9, 15,−9, 13, 11}, {1, 7, 15, −9, 13, 11}, {1, −9, −15, −5, 3, 11}, {1, 11, 5,−5, −15, −7}, {1, 11, 3, −7, −1, −9}, or {1, 7, −3, −11, −1, 9}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −7, 13, −13, −11, −3}, {1, −7, −9, −15, −3, 5}, {1, 5, 15, −15, 5,−3}, {1, 13, 11, 1, −3, 9}, {1, 11, 3, 15, 11, 5}, {1, −11, −3, 3, −9,−5}, {1, −11, −3, 3, −9, 13}, {1, −7, 3, 15, 11, 5}, {1, −3, 7, −13, 9,5}, {1, 11, 7, −13, 9, 5}, {1, 13, −9, 1, −9, −15}, {1, −9, 13, 1, 1,7}, {1, 3, 11, −1, −11, −3}, {1, 3, 11, −1, 7, −3}, {1, 9, −1, 7, 9,−3}, {1, 11, −11, 13, 15, −7}, {1, −7, 3, −5, −3, 7}, {1, 9, 7, −3, 5,−5}, {1, 13, 15, 7, −3, 5}, {1, −7, 3, 11, 9, −3}, {1, 13, −7, −5, −15,−7}, {1, −7, 13, 15, −3, 3}, {1, −13, −15, −3, 5, −9}, {1, 15, 11, −1,11, 7}, {1, −3, 11, 7, −5, 5}, {1, −13, −9, 3, −7, −3}, {1, 7, 7, −5,−15, −3}, {1, 11, 1, 11, −11, −9}, {1, −5, 5, −7, −11, 9}, or {1, −9, 1,3, −3, 7}; or

{1, −11, 11, −1, 7, 13}, {1, −3, −13, 15, −5, 5}, {1, −11, 11, −1, 3,13}, {1, 13, −9, 3, −3, −13}, {1, −11, 11, −1, 7, 13}, {1, −3, 9, −13,−1, −9}, {1, 11, 13, 1, −9, 11}, {1, 11, −9, 13, 7, 5}, {1, 3, −9, 13,1, 11}, {1, 11, −9, 15, 7, 5}, {1, −11, −3, 5, 7, −5}, {1, 7, −15, 5,−5, 15}, {1, −5, −15, −3, 7, −13}, {1, 9, 13, 1, −9, 11}, {1, −7, −11,1, 11, −9}, {1, 9, −3, −13, 7, 11}, {1, 11, −9, −13, 13, 5}, {1, −9,−15, −3, 7, −13}, {1, −11, −9, 1, 7, −5}, {1, 9, −3, −13, 7, 9}, {1, 13,11, 3, −5, 7}, {1, 13, 9, 1, −5, 7}, {1, 9, 15, 3, −7, 13}, {1, −7, 5,13, −7, −15}, {1, 1, 9, −3, −11, 9}, {1, −11, −5, 1, 7, −5}, {1, −5,−11, 1, 11, −9}, {1, −9, 1, 11, −9, −15}, {1, 13, −9, 1, −5, −15}, {1,−5, 7, −15, −5, −15}, {1, −9, 11, −15, −15, −5}, {1, −9, −15, −5, 5,−15}, {1, −9, 13, −13, −3, −3}, {1, −9, 13, 1, 1, 11}, {1, −9, 1, 1, 7,−5}, {1, −11, −15, −3, 7, −13}, {1, −11, −13, −1, 9, −11}, {1, 3, 15,−13, 7, −3}, {1, −11, −7, 5, 7, −5}, {1, 11, 11, 1, −9, 9}, {1, 15, 7,−3, −3, 7}, {1, −9, 13, 13, −9, −1}, {1, 11, 11, 1, −7, 7}, {1, −11, −3,3, −9, −5}, {1, 7, 15, 3, −7, −3}, {1, 11, 7, −13, 13, 5}, {1, 13, 5,−1, 11, 7}, {1, −11, −3, 1, 7, −5}, {1, −11, −5, −1, 7, −5}, {1, −3,−11, 1, 11, −9}, {1, 13, −9, 3, −5, −9}, {1, 11, −1, −11, 9, 15}, {1,11, 13, −13, 7, −3}, {1, 11, −9, −15, 15, 5}, {1, 11, −9, 13, 11, 5},{1, −11, −3, 5, −7, −5}, {1, −7, −15, −3, 7, 5}, {1, −7, −15, −3, −5,5}, {1, −9, −7, 13, −11, −3}, {1, −7, −15, −15, −5, 5}, {1, 11, 11, 3,−5, 7}, {1, 13, −9, 1, −7, −15}, {1, 9, 9, −1, −11, 9}, {1, −9, −9, −1,7, −5}, {1, −9, −1, 7, 7, −5}, {1, −9, 13, 1, 1, 9}, {1, 13, 13, 5, −3,7}, {1, 15, 7, −1, −3, 7}, {1, 11, 9, 1, −7, 7}, {1, −9, −7, 1, 9, −5},{1, 3, −7, 15, 1, 9}, {1, −9, −15, −3, 5, −15}, {1, −5, −15, −15, −3,5}, {1, 1, 11, −15, 5, −3}, {1, −7, 13, −13, −3, −3}, {1, −7, 3, 13, −7,−15}, {1, −7, 5, 15, −7, −15}, {1, −9, 13, −11, −11, −3}, {1, −11, −3,−3, 5, −5}, {1, −11, −3, 3, −9, 13}, {1, −11, −7, 1, −11, −5}, {1, −7,−11, 1, 11, 5}, {1, −3, −11, 1, 11, 5}, {1, −11, −3, 1, −11, −5}, {1,11, 15, −13, 7, −3}, {1, 7, 15, 3, 7, −3}, {1, −9, −3, −15, −11, −3},{1, 5, 15, 3, −7, 13}, {1, 11, 7, −13, 11, 5}, {1, −9, −3, −15, −7, −3},{1, −3, −11, 1, −5, 5}, {1, −7, −11, 1, −5, 5}, {1, −3, 9, −13, −1,−11}, {1, −9, 3, 13, −7, −11}, {1, 13, 7, −1, 11, 7}, {1, −5, −11, 1,11, 5}, {1, −11, −5, 1, −11, −5}, {1, −9, −3, −15, −9, −3}, {1, −5, −11,1, −5, 5}, {1, 11, −11, 1, −5, −15}, {1, −9, −15, −3, 7, −15}, {1, 11,11, 1, −9, 11}, {1, 1, 11, −15, 5, −5}, {1, 9, 11, −1, −11, −3}, {1, 11,3, 15, 7, 5}, {1, 3, 11, −1, 7, −3}, {1, −7, 5, −3, 7, −13}, {1, −9,−11, 1, 11, 5}, {1, −1, −11, 1, 11, 5}, {1, −11, −9, 1, −11, −5}, {1,11, −1, −11, −5, 15}, {1, −11, −1, 1, −11, −5}, {1, −9, −3, −15, −5,−3}, {1, −1, −11, 1, −5, 5}, or {1, −9, −11, 1, −5, 5}.

Optionally, when delta=0, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 3, 1, −5, 1, 7}, {1, −3, 3, 1, 7, −7}, {1, −5, 5, 5, −5, 1}, {1, 7,1, −1, 1, −5}, {1, 7, 1, −1, −7, −1}, {1, 5, 1, −7, −3, −5}, {1, 7, 1,−5, −3, 3}, {1, 5, 1, −1, 3, −7}, {1, 5, 1, −5, 7, −1}, {1, 3, 1, 7, −3,−7}, {1, 5, 1, −1, 3, −3}, {1, −3, 1, 5, −1, 3}, {1, −5, 1, 3, −7, 7},{1, −3, 1, −7, 7, −5}, {1, −3, 5, −7, −5, 5}, {1, 5, 1, −5, −1, −3}, {1,7, 5, −1, −7, −5}, {1, −3, 1, 5, 3, −7}, {1, −5, 5, 3, −7, −1}, {1, 5,1, 5, −5, −7}, {1, 3, 1, −5, 5, −7}, {1, 5, 1, −3, 1, 5}, {1, 7, 1, −5,−7, −1}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −5, −1, 3}, {1, −1, 1, −7, −3,7}, {1, −3, 1, 5, −7, 7}, {1, 5, 1, 7, −1, −3}, {1, −3, 1, −5, −1, 5},or {1, −7, 5, −1, −5, −3}; or

{1, 3, 1, −5, 1, 7}, {1, 3, 1, −5, 5, −7}, {1, 3, 1, 7, −3, −7}, {1, 3,1, −5, 7, −3}, {1, 5, 1, −5, −1, 3}, {1, 5, 1, −5, 1, 5}, {1, 5, 1, −3,1, 5}, {1, 5, 1, 5, −7, 5}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −3, 3, 7},{1, 5, 1, −1, 3, 7}, {1, 5, 1, 5, −5, 7}, {1, 5, 1, −1, 3, −7}, {1, 5,1, 5, −5, −7}, {1, 5, 1, −7, −3, −5}, {1, 5, 1, 5, −1, −5}, {1, 5, 1, 7,1, −3}, {1, 5, 1, −5, 1, −3}, {1, 5, 1, −1, 3, −3}, {1, 5, 1, −5, 7,−3}, {1, 5, 1, −5, −7, −3}, {1, 5, 1, −3, −7, −3}, {1, 5, 1, 7, −1, −3},{1, 5, 1, −7, −1, −3}, {1, 5, 1, −5, −1, −3}, {1, 5, 1, −5, 7, −1}, {1,7, 1, −5, −3, 3}, {1, 7, 1, −1, 1, −5}, {1, 7, 1, −5, −7, −1}, {1, 7, 1,−1, −7, −1}, {1, −5, 1, −1, 5, 7}, {1, −5, 1, 3, −7, 7}, {1, −3, 1, 5,−1, 3}, {1, −3, 1, −7, −1, 3}, {1, −3, 1, −5, −1, 3}, {1, −3, 1, −5, −1,5}, {1, −3, 1, 5, 3, 7}, {1, −3, 1, −1, 3, 7}, {1, −3, 1, 5, −7, 7}, {1,−3, 1, 3, −5, 7}, {1, −3, 1, 5, −5, 7}, {1, −3, 1, 5, 3, −7{ }, {1, −3,1, 5, 3, −5}, {1, −3, 1, −7, 7, −5}, {1, −1, 1, 5, −5, 7}, {1, −1, 1,−7, −3, 7}, {1, 5, 3, 7, −3, −7}, {1, 5, 3, 7, −1, −5}, {1, 7, 3, −5,−3, 3}, {1, 7, 3, −1, −7, −3}, {1, −3, 3, 7, −5, 5}, {1, −3, 3, 1, 7,−7}, {1, 7, 5, −1, −7, −5}, {1, −7, 5, 1, −5, −3}, {1, −7, 5, −1, −5,−3}, {1, −7, 5, 1, −5, −1}, {1, −5, 5, 5, −5, 1}, {1, −5, 5, 3, −7, −1},{1, −3, 5, 7, −5, 5}, {1, −3, 5, −7, −5, 5}, or {1, −3, 5, −7, −5, 7}.

Optionally, when delta=0, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 1, 3, −7, 5, −3}, {1, 1, 5, −7, 3, 5}, {1, 1, 5, −5, −3, 7}, {1, 1,−7, −5, 5, −7}, {1, 1, −7, −3, 7, −7}, {1, 3, 1, 7, −1, −5}, {1, 3, 1,−7, −3, 7}, {1, 3, 1, −7, −1, −5}, {1, 3, 3, 7, −1, −5}, {1, 5, 1, 1,−5, −3}, {1, 5, 1, 3, −5, 5}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 3, −3, 1},{1, 5, 1, 3, −1, −7}, {1, 5, 1, 5, 3, −7}, {1, 5, 1, 5, 3, −5}, {1, 5,1, 5, 7, 7}, {1, 5, 1, 5, −5, 3}, {1, 5, 1, 5, −3, 3}, {1, 5, 1, 5, −1,3}, {1, 5, 1, 5, −1, −1}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, −5, 5}, {1,5, 1, −5, 3, 5}, {1, 5, 1, −5, −7, −1}, {1, 5, 1, −5, −5, −3}, {1, 5, 1,−5, −3, 1}, {1, 5, 1, −5, −1, 1}, {1, 5, 1, −5, −1, 5}, {1, 5, 1, −5,−1, −1}, {1, 5, 1, −3, 1, 7}, {1, 5, 1, −3, 1, −5}, {1, 5, 1, −3, 7,−7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1, 5, 1, −1, 3, −5},{1, 5, 1, −1, 5, −7}, {1, 5, 1, −1, −7, −3}, {1, 5, 1, −1, −5, −3}, {1,5, 3, −3, −7, −5}, {1, 5, 3, −3, −7, −1}, {1, 5, 3, −3, −1, −7}, {1, 5,3, −1, 5, −7}, {1, 5, 3, −1, −5, −3}, {1, 5, 5, 1, 3, −3}, {1, 5, 5, −1,−7, −5}, {1, 7, 1, 1, 1, −5}, {1, 7, 1, 1, −7, −7}, {1, 7, 1, 1, −5,−5}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, −7, 1, 1}, {1,7, 1, −7, −7, −7}, {1, 7, 1, −5, 1, 1}, {1, 7, 1, −5, −5, 1}, {1, 7, 1,−5, −3, 1}, {1, 7, 1, −5, −1, 1}, {1, 7, 1, −5, −1, −1}, {1, 7, 1, −1,5, 7}, {1, 7, 3, 1, 5, −3}, {1, 7, 3, 1, −5, −5}, {1, 7, 3, 5, −5, −7},{1, 7, 3, −7, 7, −1}, {1, 7, 3, −7, −5, 3}, {1, 7, 3, −5, −7, −1}, {1,7, 3, −3, −5, 1}, {1, 7, 3, −3, −5, −1}, {1, 7, 3, −3, −3, −3}, {1, 7,3, −1, −5, −3}, {1, 7, 5, 1, −5, −5}, {1, 7, 5, 1, −5, −3}, {1, 7, 5,−5, 3, −1}, {1, 7, 5, −5, −3, −7}, {1, 7, 5, −3, −7, 1}, {1, 7, 5, −1,−5, −5}, {1, 7, 5, −1, −5, −3}, {1, −7, 1, −5, 1, 1}, {1, −7, 3, 3, −5,−5}, {1, −7, 3, 5, −1, −3}, {1, −7, 3, −5, 1, 1}, {1, −7, 3, −5, −5, 1},{1, −7, 3, −5, −5, −5}, {1, −7, 5, −3, −5, 1}, {1, −5, 1, 1, 3, 7}, {1,−5, 1, 1, 5, 7}, {1, −5, 1, 1, 7, 7}, {1, −5, 1, 3, 3, 7}, {1, −5, 1, 7,5, −1}, {1, −5, 1, 7, 7, 1}, {1, −5, 1, −7, −7, 1}, {1, −5, 1, −7, −7,−7}, {1, −5, 3, −7, −7, 1}, {1, −5, 5, 3, −5, −3}, {1, −5, 5, 3, −5,−1}, {1, −5, 5, 5, −5, −3}, {1, −5, 5, 5, −5, −1}, {1, −5, 5, 7, −5, 1},{1, −5, 5, 7, −5, 3}, {1, −5, 5, −7, −5, 1}, {1, −5, 5, −7, −5, 3}, {1,−5, 7, 3, 5, −3}, {1, −5, −7, 3, 5, −3}, {1, −5, −7, 3, 5, −1}, {1, −5,−7, 3, 7, −1}, {1, −3, 1, 1, 3, 7}, {1, −3, 1, 1, 5, 7}, {1, −3, 1, 1,5, −1}, {1, −3, 1, 3, 3, 7}, {1, −3, 1, 3, −7, 7}, {1, −3, 1, 5, 7, 1},{1, −3, 1, 5, 7, 3}, {1, −3, 1, 5, 7, 7}, {1, −3, 1, 5, −7, 3}, {1, −3,1, 7, −5, 5}, {1, −3, 1, 7, −1, 3}, {1, −3, 1, −7, 3, −1}, {1, −3, 1,−7, 7, −1}, {1, −3, 1, −7, −5, 5}, {1, −3, 1, −7, −3, 3}, {1, −3, 1, −5,7, −1}, {1, −3, 3, 3, −7, 7}, {1, −3, 3, 5, −5, −7}, {1, −3, 3, 7, 7,7}, {1, −3, 3, 7, −7, 5}, {1, −3, 3, −7, −7, 3}, {1, −3, 3, −5, −7, −1},{1, −3, 7, −5, 3, 5}, {1, −1, 1, 7, 3, −7}, {1, −1, 1, 7, 3, −5}, {1,−1, 1, −5, 5, −7}, {1, −1, 3, −7, −5, 7}, {1, −1, 5, −7, −5, 5}, {1, −1,5, −7, −5, 7}, {1, −1, 5, −5, −5, 5}, or {1, −1, 5, −5, −5, 7}; or

{1, 1, 5, −7, 3, 7}, {1, 1, 5, −7, 3, −3}, {1, 1, 5, −1, 3, 7}, {1, 1,5, −1, −7, −3}, {1, 3, 1, 7, −1, −7}, {1, 3, 1, −7, 1, −5}, {1, 3, 1,−7, 3, −5}, {1, 3, 1, −7, −1, −7}, {1, 3, 1, −5, 1, −7}, {1, 3, 1, −5,3, −7}, {1, 3, 5, −7, 3, 7}, {1, 3, 5, −1, 3, 7}, {1, 3, 5, −1, 3, −3},{1, 3, 5, −1, −5, 7}, {1, 3, 7, 1, 5, 7}, {1, 3, 7, −7, 3, 7}, {1, 3, 7,−5, 5, 7}, {1, 5, 1, 1, 5, −7}, {1, 5, 1, 1, 5, −3}, {1, 5, 1, 5, 5,−7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1,5, 1, 5, −3, 1}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 5, −1, 3}, {1, 5, 1, 7,−3, −5}, {1, 5, 1, −7, 1, −3}, {1, 5, 1, −7, −3, 5}, {1, 5, 1, −5, 5,7}, {1, 5, 1, −5, −3, 7}, {1, 5, 1, −3, 1, −7}, {1, 5, 1, −3, 5, −7},{1, 5, 1, −3, 7, −7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1,5, 3, 1, 5, −7}, {1, 5, 3, 1, 5, −3}, {1, 5, 3, 7, −3, −5}, {1, 5, 3, 7,−1, 3}, {1, 5, 3, −7, −3, 7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −1, −5,−3}, {1, 5, 5, −1, 3, 7}, {1, 5, 5, −1, 3, −3}, {1, 5, 7, 1, 3, −3}, {1,5, −7, −3, 7, 7}, {1, 7, 1, 1, 3, −5}, {1, 7, 1, 1, −7, −5}, {1, 7, 1,1, −1, −7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −5,−5}, {1, 7, 1, 3, −1, −5}, {1, 7, 1, 5, −1, −3}, {1, 7, 1, 7, −7, −7},{1, 7, 1, 7, −1, −1}, {1, 7, 1, −7, 1, −1}, {1, 7, 1, −7, −5, −5}, {1,7, 1, −7, −1, 1}, {1, 7, 1, −7, −1, −1}, {1, 7, 1, −5, −7, 1}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −5, −5, 3}, {1, 7, 1, −5, −1, 3}, {1, 7, 1, −5,−1, −3}, {1, 7, 1, −3, −7, −5}, {1, 7, 1, −3, −7, −1}, {1, 7, 1, −3, −1,5}, {1, 7, 1, −1, 1, −7}, {1, 7, 1, −1, 7, −7}, {1, 7, 1, −1, −7, −3},{1, 7, 3, 1, 7, −5}, {1, 7, 3, 1, 7, −3}, {1, 7, 3, 5, −1, −5}, {1, 7,3, −7, 7, −3}, {1, 7, 3, −7, −3, 3}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, −7, −5}, {1, 7, 3, −3, −7, −1}, {1, 7, 3, −3, −1, −5}, {1, 7, 3, −1,−7, −5}, {1, 7, 5, −1, 3, −3}, {1, 7, 5, −1, −7, −7}, {1, 7, 5, −1, −7,−3}, {1, −7, 1, 3, −3, 3}, {1, −7, 1, −7, 1, 1}, {1, −7, 3, 1, 7, −1},{1, −7, 3, 1, −7, −5}, {1, −7, 3, 1, −7, −1}, {1, −7, 3, 3, −3, −5}, {1,−7, 3, 5, −3, −5}, {1, −7, 3, −5, −7, −1}, {1, −7, 3, −5, −3, 3}, {1,−7, 3, −3, −3, 3}, {1, −7, 5, 1, −7, −3}, {1, −5, 1, 1, 3, −7}, {1, −5,1, 1, −7, 7}, {1, −5, 1, 3, 3, −7}, {1, −5, 1, 3, −7, 5}, {1, −5, 1, 5,3, 7}, {1, −5, 1, 5, 3, −3}, {1, −5, 1, 5, −7, 3}, {1, −5, 1, 5, −7, 7},{1, −5, 1, 7, 3, −1}, {1, −5, 1, 7, 5, −1}, {1, −5, 1, 7, 7, −7}, {1,−5, 1, 7, 7, −1}, {1, −5, 1, 7, −7, 1}, {1, −5, 1, 7, −7, 5}, {1, −5, 1,7, −1, 1}, {1, −5, 1, −7, 3, 1}, {1, −5, 1, −7, 7, −7}, {1, −5, 1, −7,7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −7, −5, 3}, {1, −5, 1, −3, 3,5}, {1, −5, 1, −1, 3, 7}, {1, −5, 1, −1, 7, 7}, {1, −5, 3, 1, 7, 7}, {1,−5, 3, 5, −5, 3}, {1, −5, 3, 5, −3, 3}, {1, −5, 3, −7, 7, 1}, {1, −5, 3,−7, 7, −1}, {1, −5, 3, −7, −5, 3}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1,−5, −3}, {1, −5, 5, 3, −7, 1}, {1, −5, 5, 3, −7, −3}, {1, −5, 5, 7, 3,−3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −1, 3, 5}, {1, −5, 7, 1, 3, −3},{1, −5, 7, 1, 3, −1}, {1, −5, 7, 1, 5, −1}, {1, −5, −7, 3, 3, −3}, {1,−5, −7, 3, 7, 1}, {1, −5, −7, 3, 7, −3}, {1, −3, 1, 5, −3, 1}, {1, −3,1, 7, 5, −5}, {1, −3, 1, 7, −5, 5}, {1, −3, 1, −7, −5, 5}, {1, −3, 1,−7, −3, 1}, {1, −3, 1, −7, −3, 5}, {1, −3, 1, −5, −3, 7}, {1, −3, 3, 7,−3, 3}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −5, 7}, {1, −3, 3, −7, −3,3}, {1, −1, 1, 7, −1, −7}, {1, −1, 1, −7, 3, −5}, {1, −1, 1, −7, −1, 7},{1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, −5}, or {1, −1, 5, −7, 3, 7}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 1, 5, −5, 3, −3}, {1, 1, 7, −5, 7, −1}, {1, 1, 7, −1, 3, −1}, {1, 1,−5, 3, −1, 3}, {1, 1, −5, 7, −5, 3}, {1, 1, −3, 7, −1, 5}, {1, 3, 7, −5,3, −3}, {1, 3, −1, −7, 1, 5}, {1, 5, 1, −7, 3, 3}, {1, 5, 1, −5, −5, 1},{1, 5, 3, −1, −5, 3}, {1, 5, 5, 1, −5, 3}, {1, 5, 7, 3, −3, 5}, {1, 5,−7, 1, −5, 7}, {1, 5, −7, −5, 7, 1}, {1, 5, −5, 3, −3, −7}, {1, 5, −5,3, −1, −5}, {1, 5, −5, −5, 5, −3}, {1, 5, −3, 3, 3, −3}, {1, 5, −3, 7,3, 5}, {1, 7, 7, 1, −7, 5}, {1, 7, 7, 1, −3, 1}, {1, 7, −5, 7, −1, −7},{1, 7, −5, −7, 5, 1}, {1, 7, −5, −5, 7, 1}, {1, 7, −1, 3, −1, −7}, {1,7, −1, −7, 5, 5}, {1, 7, −1, −5, 7, 5}, {1, −7, 3, 3, −7, −3}, {1, −7,3, −1, 1, 5}, {1, −7, 5, 1, −1, 3}, {1, −7, 5, −7, −1, −1}, {1, −7, −3,1, 3, −1}, {1, −7, −3, −7, 3, 3}, {1, −7, −1, 3, 3, −1}, {1, −7, −1, −1,−7, 5}, {1, −5, 3, 7, −5, −3}, {1, −5, 3, −1, 3, −7}, {1, −5, 7, 7, −5,1}, {1, −5, 7, −7, −3, 1}, {1, −5, 7, −5, 3, −7}, {1, −5, −5, 1, 5, 1},{1, −5, −5, 1, −7, −3}, {1, −3, 1, 7, 7, 1}, {1, −3, 1, −7, −1, −1}, {1,−3, 5, −5, −1, −3}, {1, −3, 5, −1, −1, 5}, {1, −3, 7, 7, −3, 5}, {1, −3,7, −1, 3, 7}, {1, −3, 7, −1, 5, −7}, {1, −3, −7, 1, 7, −5}, {1, −3, −7,7, −5, 1}, {1, −3, −3, 1, 7, −1}, {1, −3, −1, 3, 7, −1}, {1, −1, 3, −7,1, −3}, or {1, −1, −5, 7, −1, 5};

{1, 3, 7, −5, 1, −3}, {1, 3, −7, 5, 1, 5}, {1, 3, −7, −3, 1, −3}, {1, 3,−1, −5, 1, 5}, {1, 5, 1, −3, 3, 5}, {1, 5, 1, −3, 7, 5}, {1, 5, 1, −3,−5, 5}, {1, 5, 1, −3, −1, 5}, {1, 5, 3, −3, −7, 5}, {1, 5, 7, 3, −1, 5},{1, 5, 7, −3, −7, 5}, {1, 5, −7, 3, 1, −3}, {1, 5, −7, 5, 1, 7}, {1, 5,−7, 7, 3, −1}, {1, 5, −7, −5, 1, −3}, {1, 5, −7, −1, 1, −3}, {1, 5, −5,7, 3, 5}, {1, 5, −5, −3, −7, 5}, {1, 5, −1, −5, 7, 5}, {1, 5, −1, −3,−7, 5}, {1, 7, 3, −1, 3, 7}, {1, 7, −7, 5, 1, 5}, {1, 7, −7, −3, 1, −3},{1, 7, −5, −1, 1, −3}, {1, −5, 7, 3, 1, 5}, {1, −5, −7, 5, 1, 5}, {1,−3, 1, 5, 7, −3}, {1, −3, 1, 5, −5, −3}, {1, −3, 3, 5, −7, −3}, {1, −3,−7, 3, 1, 5}, {1, −3, −7, 7, 1, 5}, {1, −3, −7, −5, 1, 5}, {1, −3, −7,−3, 1, −1}, {1, −3, −7, −1, 1, 5}, {1, −3, −5, 5, −7, −3}, {1, −3, −1,3, 7, −3}, {1, −3, −1, 5, −7, −3}, {1, −1, 3, 7, 3, −1}, {1, −1, −7, 5,1, 5}, or {1, −1, −5, 7, 1, 5};

{1, 3, −3, 1, 3, −3}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 3, 7}, {1,3, −3, −7, −5, 5}, {1, 3, −3, −1, 3, −3}, {1, 5, −1, −7, 3, 7}, {1, 7,3, 1, 5, −1}, {1, 7, 3, 1, 7, 5}, {1, 7, 3, 1, −5, −1}, {1, 7, 3, 1, −3,3}, {1, 7, 3, 5, −7, 3}, {1, 7, 3, 5, −1, 3}, {1, 7, 3, 7, 1, 3}, {1, 7,3, −7, 3, 7}, {1, 7, 3, −7, 5, −5}, {1, 7, 3, −7, 7, −3}, {1, 7, 3, −7,−3, 7}, {1, 7, 3, −7, −1, −3}, {1, 7, 3, −3, 1, −5}, {1, 7, 3, −3, 7,−5}, {1, 7, 3, −1, −7, −5}, {1, 7, 5, 1, 7, 5}, {1, 7, 5, −7, −1, −3},{1, 7, 5, −1, −7, −3}, {1, −5, −3, 1, −5, −3}, {1, −5, −3, 7, −5, 5},{1, −5, −3, −7, 3, 5}, {1, −5, −3, −7, 3, 7}, {1, −5, −3, −1, 3, −3},{1, −3, 3, 1, 3, −3}, {1, −3, 3, 1, 5, −1}, {1, −3, 3, 1, −5, −1}, {1,−3, 3, 5, −7, 3}, {1, −3, 3, 5, −1, 3}, {1, −3, 3, 7, −3, −5}, {1, −3,3, −7, 3, 7}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −3, 7}, {1, −3, 3,−3, 7, −5}, {1, −3, 3, −1, 5, 3}, {1, −1, 5, 1, −1, 5}, {1, −1, 5, −7,7, −3}, or {1, −1, 5, −7, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {1, 3, 3, −3, 5,−5}, {1, 3, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1,3, 5, 7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5,−1, −7, −3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5,−3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3},{1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1,−7, 5, −3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5,−3}, {1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1,5, 3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5,1, −5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, or {1, −1, 3, −3, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {1, 3, 3, −3, 5,−5}, {1, 3, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1,3, 5, 7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5,−1, −7, −3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5,−3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3},{1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1,−7, 5, −3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5,−3}, {1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1,5, 3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5,1, −5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, or {1, −1, 3, −3, −3, 7}; or

{1, 1, −7, 5, −1, 1}, {1, 1, −7, 7, −3, 1}, {1, 1, −7, −5, 5, 1}, {1, 1,−7, −3, 3, 1}, {1, 1, −7, −3, −5, 1}, {1, 1, −7, −1, −3, 1}, {1, 3, 7,1, 5, 1}, {1, 3, −5, 3, 5, 1}, {1, 3, −5, 3, 5, −3}, {1, 3, −5, 7, −7,1}, {1, 3, −5, 7, −5, 5}, {1, 3, −5, 7, −1, 1}, {1, 3, −5, −5, 3, −1},{1, 3, −5, −3, 5, 1}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 1, 1}, {1,3, −1, 7, −7, 1}, {1, 5, 1, −7, −5, −1}, {1, 5, 3, −7, 1, 1}, {1, 5, 7,−1, −5, −1}, {1, 5, −5, −7, 1, 1}, {1, 5, −3, −5, 3, 1}, {1, 5, −1, 3,5, −3}, {1, 5, −1, 3, −3, −1}, {1, 5, −1, 3, −1, 7}, {1, 7, 5, −7, 1,1}, {1, 7, 5, −3, −3, 5}, {1, 7, −5, 3, 3, −5}, {1, −7, 1, 3, −5, 7},{1, −7, 1, 3, −1, 7}, {1, −7, 5, 7, −1, 7}, {1, −7, 5, −7, 3, 7}, {1,−7, 5, −3, −1, 7}, {1, −7, 5, −1, 1, −7}, {1, −7, 7, −3, 1, −7}, {1, −7,7, −1, 3, −5}, {1, −7, 7, −1, −3, 5}, {1, −7, −7, 1, 3, −3}, {1, −7, −7,1, 5, −5}, {1, −7, −7, 1, 7, 5}, {1, −7, −7, 1, −3, 7}, {1, −7, −7, 1,−1, 5}, {1, −7, −5, 3, 5, −3}, {1, −7, −5, 3, −5, −3}, {1, −7, −5, 3,−1, 1}, {1, −7, −5, 3, −1, 7}, {1, −7, −5, 5, 1, −7}, {1, −7, −5, 7, −1,1}, {1, −7, −5, −1, −7, −3}, {1, −7, −3, 3, 1, −7}, {1, −7, −3, 5, 3,−5}, {1, −7, −3, −5, 1, −7}, {1, −7, −1, −3, 1, −7}, {1, −5, 7, −1, −1,7}, {1, −5, −3, 5, 5, −3}, {1, −5, −3, 7, −5, 5}, {1, −5, −1, −7, −5,5}, {1, −5, −1, −7, −3, 7}, {1, −5, −1, −5, 3, 5}, {1, −3, 1, −5, −1,1}, {1, −3, 5, 5, −3, −1}, {1, −3, 5, 7, −1, 1}, {1, −3, 5, 7, −1, 7},{1, −3, 7, −7, 1, 1}, {1, −3, −1, 7, −1, 1}, {1, −1, 3, −5, −5, 3}, {1,−1, 5, −7, 1, 1}, {1, −1, 5, −3, −3, 5}, {1, −1, 7, 5, −3, 1}, {1, −1,7, 7, −1, 3}, or {1, −1, 7, −5, 3, 1}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 5, 1, −5, 3, 3}, {1, −5, 1, 3, −3, 7}, {1, 7, 1, 7, −3, −5}, {1, 5,5, −5, 3, −1}, {1, 7, 1, 1, −3, 5}, {1, 7, 1, −1, 5, −5}, {1, 7, 1, −5,−3, −1}, {1, −1, 5, −7, −1, −1}, {1, 7, 1, −5, −3, 7}, {1, −3, 1, 1, −5,3}, {1, 1, 7, −7, 3, −1}, {1, 5, 1, 1, 7, −1}, {1, −5, 1, 7, 5, −5}, {1,−5, 1, 7, −3, −5}, {1, 7, 3, −1, 5, 5}, {1, 5, 1, 3, −1, 5}, {1, −3, 1,−5, 3, −7}, {1, −7, 5, −1, 3, −7}, {1, 5, 1, 7, −1, −7}, {1, 5, 1, −5,−5, 3}, {1, −5, 1, −1, 5, −5}, {1, −5, 1, 3, −3, −1}, {1, −3, 1, 5, −1,−5}, {1, −3, 1, −1, 3, −3}, {1, 7, 1, −5, 5, 7}, {1, 7, 1, 3, 5, −1},{1, 7, 3, −1, −1, 5}, {1, 7, 1, 7, 5, 3}, {1, 5, 1, −3, 3, 7}, or {1,−5, 3, 7, −3, −3}; or

{1, −5, 1, 3, −3, −1}, {1, −5, 1, 3, 5, −1}, {1, −5, 3, 7, −3, −3}, {1,−5, 3, −7, −3, −3}, {1, −3, 1, 1, −5, 3}, {1, −3, 1, 7, −1, −1}, {1, −3,1, 7, 7, −1}, {1, −3, 3, 7, −5, −3}, {1, −3, 3, 7, −3, −3}, {1, −3, 3,7, −1, −1}, {1, −3, 5, 5, −5, −1}, {1, −3, 5, −7, −5, −1}, {1, −3, 5,−7, −3, −1}, {1, −3, 5, −7, −1, −1}, {1, −1, 5, −7, −1, −1}, {1, 1, 5,−5, 3, −1}, {1, 1, 5, −1, −5, 3}, {1, 1, 5, −1, −5, 5}, {1, 1, 5, −7, 3,−1}, {1, 1, 7, −7, 3, −1}, {1, 3, 5, −1, −5, 5}, {1, 3, 5, −7, 3, −1},{1, 3, 7, −7, 3, −1}, {1, 5, 1, −5, −5, 3}, {1, 5, 1, −5, 3, 3}, {1, 5,1, −1, −5, 5}, {1, 5, 1, 1, 7, −1}, {1, 5, 1, 3, −1, 5}, {1, 5, 3, −1,−5, 5}, {1, 5, 5, −5, 3, −1}, {1, 5, 5, −1, −5, 3}, {1, 5, 5, −1, −5,5}, {1, 7, 1, −5, −3, −1}, {1, 7, 1, −1, −3, 3}, {1, 7, 1, −1, 5, 3},{1, 7, 1, 1, −3, 5}, {1, 7, 1, 3, 5, −1}, {1, 7, 1, 7, 5, 3}, {1, 7, 3,−3, −3, 5}, {1, 7, 3, −1, −1, 5}, {1, 7, 3, −1, 1, 5}, {1, 7, 3, −1, 5,5}, {1, 7, 3, 1, −3, 5}, {1, 7, 3, 1, −1, 5}, {1, 7, 3, 3, −3, 5}, {1,7, 3, 3, −1, 5}, {1, 7, 5, −1, −3, 3}, {1, 7, 5, −1, −1, 5}, {1, 7, 5,1, −3, 5}, {1, 7, 5, 1, −1, 5}, {1, −7, 3, −1, −1, 3}, {1, −7, 3, −1,−1, 5}, {1, −7, 3, 3, −1, 5}, {1, −7, 5, −1, 1, 5}, {1, −7, 5, −1, 3,5}, or {1, −7, 5, 1, −1, 5}.

Optionally, when delta=0, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{32}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 19, 1, −19, 29, −17}, {1, −17, −1, 17, 17, −9}, {1, 11, −29, 15,−15, 5}, {1, 15, −5, −5, 9, −13}, {1, −19, 19, 29, −13, −21}, {1, 7, 31,−9, −17, 25}, {1, −19, −7, −29, −29, −13}, {1, 19, 7, −25, −9, −21}, {1,−19, −5, 9, −13, 1}, {1, 21, −25, −19, 25, 5}, {1, 19, −11, −25, −9,13}, {1, 11, 31, −13, 31, 25}, {1, −3, −19, −5, −27, −13}, {1, −27, 19,−23, 31, −11}, {1, 25, 17, −7, −27, −5}, {1, 27, 3, −7, 3, −19}, {1, 21,−3, 9, 3, −21}, {1, −17, −9, 7, 25, 21}, {1, 19, −29, 17, −29, 29}, {1,−11, 3, −5, 9, 23}, {1, 9, −13, 27, 17, −27}, {1, −7, 13, −19, 25, −3},{1, 19, −27, 5, 23, 11}, {1, 11, −11, −11, −31, −15}, {1, 15, 5, 19, −3,−13}, {1, 23, 9, −17, 3, −11}, {1, −7, 31, 9, −29, −7}, {1, 25, −17, 25,−31, 5}, {1, 17, 1, −13, −25, −9}, or {1, −19, 3, 29, 23, −7}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{32}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, −23, 21, −1, −3, 17}, {1, 19, −3, −23, −7, −27}, {1, −17, −13, 29,−3, 17}, {1, −21, 5, 25, 17, −21}, {1, 23, −19, −19, −29, −7}, {1, −11,13, 11, −31, −9}, {1, 7, −17, 5, 15, −9}, {1, 1, 11, −11, 13, −9}, {1,23, −1, −11, 15, −27}, {1, 23, 27, 7, 27, −17}, {1, −19, −27, −7, 11,−31}, {1, −3, −23, 21, −23, 21}, {1, 29, 9, 17, −1, 11}, {1, 27, 29, 5,−15, 23}, {1, −5, 17, −21, −29, 11}, {1, −17, −13, 9, −7, 11}, {1, −3,−25, −9, −27, 15}, {1, −19, 1, −11, −7, 13}, {1, 17, −27, 13, 9, −13},{1, −17, −11, 11, 31, −17}, {1, 19, 13, −9, −29, 19}, {1, −21, 31, −15,−23, −3}, {1, −21, −19, 19, 31, −9}, {1, 23, 31, 5, 15, −5}, {1, −23,17, 21, −19, 23}, {1, 21, 27, −15, −29, 17}, {1, 23, 23, 11, −29, −7},{1, −25, −3, −1, 13, −9}, {1, 21, −23, −21, 23, −21}, or {1, 21, 11, 31,11, 13}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 3, −11, 9, −5, −3}, {1, 9, −15, 13, 3, 11}, {1, −9, −13, −5, 3, −7},{1, −13, −15, 5, −9, −3}, {1, −13, 7, 5, −9, −3}, {1, −11, 7, 11, 9,15}, {1, −11, −1, 5, 15, 7}, {1, 11, 5, −7, −15, −5}, {1, 11, −1, −9,−15, −5}, {1, −11, 13, −9, −1, −7}, {1, 11, 3, −9, −1, −7}, {1, 9, −3,−11, −1, −7}, {1, −11, −3, 5, −1, 9}, {1, 9, −1, −5, −13, −5}, {1, −13,5, 5, 11, −3}, {1, −13, −9, 9, 15, 15}, {1, −9, 9, 5, 11, 15}, {1, 3, 3,−11, 7, 15}, {1, 5, 11, 7, −7, 15}, {1, 9, −5, 13, 13, 15}, {1, −11, −1,7, −3, 5}, {1, 9, −13, 7, 3, 11}, {1, 9, −15, 15, 5, −7}, {1, 11, 3,−11, −13, −5}, {1, −1, −15, −9, 9, −5}, {1, −13, −15, −9, 9, −5}, {1,−11, −5, 13, −1, −5}, {1, −13, 5, 11, −1, 5}, {1, −13, 5, −9, −1, 3}, or{1, −13, 5, −9, −11, −7}; or

{1, 3, −11, 9, −5, −3}, {1, 3, 7, −7, 13, −1}, {1, −13, −9, −7, −5, 13},{1, −11, 7, 11, 11, 15}, {1, −11, 7, 11, 15, 15}, {1, 1, 5, 9, −5, 15},{1, −13, −13, −11, −5, 13}, {1, 7, −7, 13, −1, 1}, {1, −11, 7, 13, 13,15}, {1, −13, −11, −5, −5, 13}, {1, 3, −11, 9, −5, −5}, {1, −11, 7, 13,15, 15}, {1, −11, −15, −7, 1, −7}, {1, 5, −9, 11, −3, −5}, {1, −13, −15,−11, −5, 13}, {1, −13, −15, 5, −9, −3}, {1, −13, 7, 5, −9, −3}, {1, 5,3, −11, 9, −5}, {1, −11, 7, 11, −15, 3}, {1, −7, 1, 9, 5, −7}, {1, 5,11, 9, −5, 15}, {1, −11, 7, 11, 9, 15}, {1, −13, 7, −7, −1, −3}, {1,−13, 7, 5, −9, −5}, {1, −11, −1, 5, 15, 7}, {1, 11, 5, −7, −15, −5}, {1,11, 3, −9, −15, −5}, {1, 11, −1, −9, −15, −5}, {1, −15, −9, −7, −5, 13},{1, 3, 9, 11, −5, 15}, {1, 11, −1, −7, −15, −5}, {1, 11, 5, −3, −15,−5}, {1, −15, −13, −7, −5, 13}, {1, 3, 5, 11, −5, 15}, {1, −13, −13, −5,−5, 13}, {1, −11, 13, −9, −1, −7}, {1, 11, 5, −3, −15, −7}, {1, 11, 5,−7, −15, −7}, {1, −9, −15, −5, 1, 11}, {1, 11, 3, −9, −1, −7}, {1, 7, 7,11, −3, −15}, {1, −15, −11, −7, −5, 13}, {1, 5, 7, 11, −5, 15}, {1, −11,−3, 5, 15, 7}, {1, −5, −15, −5, 1, 11}, {1, 9, −1, −5, −13, −5}, {1,−11, 5, 11, 15, 15}, {1, 7, 11, −5, 15, 1}, {1, 9, 3, 11, 3, −9}, {1,−7, −11, 11, −13, −7}, {1, 1, 7, −9, 11, −3}, {1, 5, 11, −5, 15, 1}, {1,−13, 13, −9, −3, 7}, {1, −15, −11, −5, −5, 13}, {1, 11, 5, −5, −15, −5},{1, −11, 5, 9, 9, 15}, {1, 7, 7, 11, −5, 15}, {1, 3, 7, 11, −5, 15}, {1,9, 15, −9, −13, 11}, {1, −9, 15, 11, −13, −7}, {1, 9, 1, 9, 3, −9}, {1,11, −1, −7, 1, −7}, {1, −11, 5, 9, 11, 15}, {1, −13, 7, −9, −7, 1}, {1,11, −1, −9, −1, −7}, {1, 9, 11, −5, 15, 1}, {1, −11, 15, 7, −15, −7},{1, 9, 1, −11, 15, −7}, {1, −7, −13, −3, 5, 13}, {1, −7, −15, −5, 1,11}, {1, 11, 3, −5, −15, −5}, {1, 11, 5, −5, −15, −7}, {1, 11, 3, −7,−15, −5}, {1, −9, 1, 9, 3, 11}, {1, −9, −15, −5, 3, 11}, {1, −9, −1, −7,1, 11}, {1, −9, −15, 11, −13, −7}, {1, −5, −11, 11, −13, −7}, {1, −13,5, 5, 11, −3}, {1, −13, −9, 9, 15, 15}, {1, −13, 5, 11, −3, 1}, {1, −13,−13, −9, 9, 15}, {1, −11, −13, 9, −15, −9}, {1, −11, −13, 9, −13, −7},{1, 7, 15, 5, 3, −9}, {1, −11, −13, −5, 1, 11}, {1, 3, −11, 9, −5, −7},{1, 9, 7, −5, −15, −5}, {1, 11, −1, −11, −13, −5}, {1, −11, −1, 5, 13,11}, {1, −13, 7, −7, −5, 3}, {1, −1, −13, −5, 1, 11}, {1, −3, −15, −5,1, 11}, {1, 11, 7, −5, −15, −5}, {1, 11, 7, −3, −15, −5}, {1, −15, −9,−11, −5, 11}, {1, −13, −7, −11, −7, 11}, {1, 11, −1, −11, −15, −5}, {1,3, −11, −3, −3, 15}, {1, 11, −1, −5, −15, −5}, {1, 9, −1, −11, −13, −5},{1, −11, −15, −5, 1, 11}, {1, 3, 3, −11, 7, 15}, {1, 9, 3, 11, −3, −9},{1, −9, 13, −11, −13, −7}, {1, 9, 15, −9, 13, 11}, {1, −9, −1, 5, 13,11}, {1, −5, 3, 11, −11, 15}, {1, −13, 9, −5, −1, −5}, {1, 9, −13, 13,−1, 7}, {1, −1, 7, −3, −13, −5}, {1, 3, −11, 7, 7, 15}, {1, 9, −5, 13,13, 15}, {1, −13, 13, −9, −1, 7}, {1, 11, 7, −7, −15, −5}, {1, 11, 3,−11, −15, −5}, {1, −11, −3, 5, 15, 5}, {1, −11, −1, 7, −3, 5}, {1, −11,−1, −11, −3, 5}, {1, 11, 1, −11, −3, −7}, {1, 11, −1, −11, −3, −7}, {1,11, −1, −11, −15, −7}, {1, 11, −1, −5, −15, −7}, {1, −11, −1, −5, 3,11}, {1, 11, −1, −5, 3, 11}, {1, −11, −15, −5, 3, 11}, {1, −11, −3, 5,15, 11}, {1, 9, −13, 7, 3, 11}, {1, −11, −3, 5, 1, 11}, {1, −3, 7, −5,−15, −7}, {1, 9, −13, 15, 3, −7}, {1, −11, −1, 7, 3, 11}, {1, −11, −15,−7, 1, 11}, {1, −11, −1, 7, 15, 5}, {1, −11, −1, 7, 15, 11}, {1, 11,−13, −5, 15, 11}, {1, −9, 1, −3, 5, 13}, {1, −9, 1, 9, −15, 13}, {1, 9,−3, −13, −3, 5}, {1, −9, −13, −3, 5, 13}, {1, −11, −5, −9, −3, 13}, {1,7, 13, 9, −3, −15}, {1, −11, 5, 11, 7, 13}, {1, −11, −15, −9, −3, 13},{1, 9, −15, 15, 3, 11}, {1, 9, −15, 15, 5, −7}, {1, 9, −15, 15, −9, 13},{1, 9, −1, 7, −5, −7}, {1, −11, −13, −5, 3, 11}, {1, −1, −11, −3, −15,−7}, {1, −1, 7, 15, 3, 11}, {1, 9, −15, 15, 3, −7}, {1, −11, −3, −5, 3,11}, {1, −1, 7, −5, −15, −7}, {1, −1, 7, 15, 3, −7}, {1, 9, −15, −7, 13,3}, {1, −11, 5, 11, 9, 15}, {1, 7, 13, 11, −3, −15}, {1, −1, 5, 11, −3,−15}, {1, 7, 5, −11, 9, −5}, {1, 7, 5, 11, −5, 15}, {1, −15, 5, −9, −11,−5}, {1, −11, 5, 9, 7, 15}, {1, −11, −13, 11, −13, −7}, {1, 9, −13, 15,1, −7}, {1, −11, 7, 11, 7, 13}, {1, 11, 3, −11, −3, −7}, {1, 11, 3, −11,−15, −7}, {1, −7, 3, 11, −13, 15}, {1, 11, 3, −11, −3, 5}, {1, −11, 5,13, 11, 15}, {1, 5, −11, −13, 5, −7}, {1, −1, 7, 13, −11, 13}, {1, 5,13, 11, −3, −15}, {1, −3, −15, 3, 7, 13}, {1, −1, −13, 3, 7, 15}, {1, 9,−7, 13, −1, 3}, {1, −7, 1, −13, 15, −7}, {1, 9, −13, 15, 1, 9}, {1, −13,7, −5, 1, −3}, {1, −1, 7, 11, −3, −15}, {1, −7, 3, 11, 7, 15}, {1, −11,7, 13, 9, 13}, {1, 9, 1, −13, 15, −7}, {1, −11, −15, −9, −5, 13}, {1, 9,7, −9, 11, −3}, {1, −11, 7, 3, 9, 13}, {1, 9, 13, −3, −15, 15}, {1, −1,−13, 11, −13, −7}, {1, −15, 5, −9, −11, −3}, {1, −1, 3, −13, 7, −7}, {1,9, −5, −13, −3, −7}, {1, 5, −9, 11, 7, −5}, {1, 9, 1, −1, −13, −5}, {1,5, 1, 7, −7, 13}, {1, −11, 7, 11, −15, 13}, {1, 5, 1, −11, 9, −5}, {1,−13, 7, −5, −9, −5}, {1, −13, 7, −5, −1, 5}, {1, 9, −3, 15, 13, −3}, {1,11, 3, −11, −13, −5}, {1, −7, 3, 9, −15, 15}, {1, −11, −15, −7, −3, 13},{1, 5, 13, 9, −3, −15}, {1, −13, −15, −9, 9, 15}, {1, −1, 5, 11, −3,15}, {1, −13, 5, 3, −11, −5}, {1, −1, −15, −9, 9, −5}, {1, −13, 5, 11,−3, 3}, {1, 7, 13, 11, −3, 15}, {1, −13, −7, −1, −15, 15}, {1, −13, −15,−9, 9, −5}, {1, 7, −5, 13, −13, 15}, {1, −3, 15, 3, −11, −5}, {1, −13,−7, −11, 7, −5}, {1, −11, −5, 13, −1, −5}, {1, −13, 5, 11, −1, 5}, {1,7, −7, 13, −13, 5}, {1, −11, −5, 1, −3, 15}, {1, −11, 7, −7, −11, −5},{1, −13, −7, −11, −5, 13}, {1, −3, 3, 9, −5, 15}, {1, 7, −5, 13, 9, 15},{1, −13, −5, −7, 11, −3}, {1, −13, 5, −9, −11, −3}, {1, −13, 5, 3, −11,−3}, {1, −1, −15, −11, −3, 15}, {1, 9, −5, 13, 11, 15}, {1, 5, −9, 9, 7,15}, {1, 9, −5, −7, 11, −3}, {1, −1, −15, 3, 11, 15}, {1, 5, 13, 11, −3,15}, {1, 5, 3, −11, 7, 15}, {1, −13, 5, −9, −1, 3}, {1, −13, 5, −9, −11,−7}, {1, −13, −5, 13, 11, 15}, {1, 5, 3, −11, −3, 15}, {1, 7, 15, 3, 1,−11}, {1, −11, −3, 3, 15, 3}, {1, 7, 15, 13, 1, −11}, {1, −11, −13, −5,1, 13}, {1, −11, −13, −7, 1, 13}, {1, −11, 1, 9, 15, 13}, {1, 13, 3,−11, −5, −7}, {1, 7, −15, 7, −5, −5}, {1, −13, −15, −5, −3, 13}, {1,−11, 11, −11, −5, 1}, {1, −9, 3, 9, −15, 15}, {1, −13, −15, −9, −1, 11},{1, 3, 13, 11, −3, −15}, {1, −9, 3, 11, −15, 15}, {1, −1, 5, −9, 13,−7}, or {1, 13, 3, −11, −13, −5}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, −7, −7, −3, −1, 7}, {1, 5, 5, −3, 5, 7}, {1, 5, −3, −5, 1, 5}, {1,7, −7, −1, −3, 7}, {1, −1, 1, −5, −3, 7}, {1, 7, 3, −5, −1, −3}, {1, 7,−7, −1, −7, 7}, {1, −5, −3, −5, 5, −1}, {1, 5, 7, 7, −1, 7}, {1, −7, 3,3, −5, −1}, {1, 7, −1, 3, −1, −3}, {1, −1, 1, −7, 3, −3}, {1, 1, −5, 3,5, −7}, {1, −1, 5, 1, −7, −3}, {1, 5, −7, 5, −5, 5}, {1, 5, 1, 1, −5,−1}, {1, 5, −7, 7, 1, 5}, {1, 5, −7, 1, −3, 3}, {1, −5, 3, 3, 7, −1},{1, 3, −5, −1, −1, 7}, {1, −7, −5, −7, −3, 7}, {1, −1, −5, −1, −7, −3},{1, −5, 5, 3, −7, −5}, {1, −7, 3, 7, −1, −1}, {1, −3, 5, 3, −7, −3}, {1,−7, −5, 5, −3, 1}, {1, −5, 5, −5, −1, −1}, {1, 3, −3, 1, −7, 1}, {1, −1,7, 3, 7, −5}, or {1, 1, 5, −3, 7, −7}; or

{1, −5, 3, 3, 5, −3}, {1, −1, 3, −5, 5, −1}, {1, 5, 1, 1, −5, −1}, {1,−1, 1, −5, −3, 7}, {1, −5, 3, 3, 7, −1}, {1, −1, 7, 3, 7, −5}, {1, −7,−7, −3, −1, 7}, {1, 5, 5, −3, 7, −1}, {1, −5, 5, 3, 7, −7}, {1, 1, 5,−3, 7, −7}, {1, 5, −5, 5, −1, −1}, {1, −1, 3, 5, −1, −7}, {1, −7, 3, 7,−1, −1}, {1, 3, −5, 5, 1, −3}, {1, −7, 3, 3, −5, −1}, {1, 1, −3, 1, 3,7}, {1, −5, 1, 5, 7, 7}, {1, −1, −7, 3, −5, −3}, {1, 1, −7, 3, 7, −1},{1, 5, −1, 1, 1, −7}, {1, 7, −7, −3, 7, 7}, {1, −7, −7, −3, 7, −7}, {1,5, 7, 1, 1, −5}, {1, 1, 3, 7, −1, −7}, {1, 5, 5, −3, 5, 7}, {1, −5, 3,7, −7, 1}, {1, −1, 1, −7, 3, −3}, {1, −5, 3, 5, −7, 5}, {1, −3, 5, 3,−7, −3}, {1, −1, 5, 1, −7, −3}, {1, 1, −5, −1, 7, −1}, {1, −7, −5, 5,−3, 1}, {1, −5, 1, 3, 7, 7}, {1, 3, −3, 7, −1, 3}, {1, −7, −5, −7, −3,7}, {1, 5, 7, −3, 7, 7}, {1, −7, 3, −3, −1, 3}, {1, 3, −5, 3, 7, 1}, {1,−7, 3, 1, −5, −1}, {1, 1, −5, 3, 5, −7}, {1, 5, −7, 1, −3, 3}, {1, −1,3, 7, −3, −7}, {1, 3, −7, 3, −3, −3}, {1, −1, −7, 1, 3, 7}, {1, 1, 3, 7,1, −7}, {1, 3, −5, −1, −1, 7}, {1, −5, −3, −5, 5, −1}, {1, −7, −5, −5,−1, 7}, {1, 1, −7, −5, −1, 7}, {1, 5, −7, 7, −1, −5}, {1, 7, 1, 1, −5,−3}, {1, 5, 7, 7, −1, 7}, {1, −7, 3, −5, −1, 1}, {1, −5, 5, −5, −1, −1},{1, 7, 1, −5, −3, −3}, {1, 3, −3, 1, −7, 1}, {1, 1, 3, −5, 5, −3}, or{1, 3, 3, −5, −1, −7}.

According to a second aspect, a signal processing method is provided.The method includes:

generating a local sequence, where the local sequence is a firstsequence or a conjugate transpose of a first sequence, the localsequence is used to process a first signal, and the first signal is asignal modulated by using π/2 binary phase shift keying BPSK; and

receiving a reference signal of the first signal on a firstfrequency-domain resource, where the first frequency-domain resourceincludes K subcarriers each having a subcarrier number of k,k=u+M*n+delta, n=0, 1, . . . , K−1, M is an integer greater than orequal to 2, delta∈{0, 1, . . . , M−1}, u is an integer, the subcarriernumbers are numbered in ascending or descending order of frequencies,and the reference signal is generated by using the first sequence, wherethe first sequence varies as a delta value varies.

Optionally, the method further includes:

sending indication information, where the indication information is usedto indicate a sequence that is in each of at least two sequence groupsand used to generate the reference signal.

According to a third aspect, a signal processing method is provided. Themethod includes:

When delta=0, the method further includes:

determining the first sequence {x(n)} based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −5, 5, 11, −13, 11}, {1, −5, 3, 13, 3, −5}, {1, −5, 5, 13, 5, 11},{1, −9, −5, 5, 15, 11}, {1, 9, −15, 11, −13, 11}, {1, 9, −15, 11, 3,11}, {1, 11, −11, −9, 13, 3}, {1, −7, 7, 15, 11, 15}, {1, −9, −1, −5,−15, −7}, {1, −13, −9, −15, −5, 7}, {1, −1, 7, 15, 3, 11}, {1, 9, −15,15, −9, 11}, {1, 15, 7, −5, −11, −9}, {1, 11, 15, −3, −13, 5}, {1, 9,−15, 15, 7, 15}, {1, 9, −15, 9, 7, 15}, {1, −11, −3, 11, −15, 13}, {1,11, 1, 5, −9, −9}, {1, −3, 9, −1, −15, −11}, {1, 15, −13, 7, −5, −9},{1, 11, −3, 3, 1, −9}, {1, −11, −13, 9, −13, −3}, {1, −11, −7, 3, 13,3}, {1, −11, 11, −11, −7, 3}, {1, −11, −15, −9, 3, 11}, {1, 15, 5, −9,−7, −9}, {1, 11, 15, 9, −1, −11}, {1, −11, −1, −5, 5, 11}, {1, 7, −5, 5,15, 11}, or {1, 11, 3, 13, −13, 15}; or

{1, −11, 11, −1, 7, 13}, {1, −3, −13, 15, −5, 5}, {1, −11, 11, −1, 3,13}, {1, 13, −9, 3, −3, −13}, {1, −11, 11, −1, 7, 13}, {1, −3, 9, −13,−1, −9}, {1, 11, 13, 1, −9, 11}, {1, 11, −9, 13, 7, 5}, {1, 3, −9, 13,1, 11}, {1, 11, −9, 15, 7, 5}, {1, −11, −3, 5, 7, −5}, {1, 7, −15, 5,−5, 15}, {1, −5, −15, −3, 7, −13}, {1, 9, 13, 1, −9, 11}, {1, −7, −11,1, 11, −9}, {1, 9, −3, −13, 7, 11}, {1, 11, −9, −13, 13, 5}, {1, −9,−15, −3, 7, −13}, {1, −11, −9, 1, 7, −5}, {1, 9, −3, −13, 7, 9}, {1, 13,11, 3, −5, 7}, {1, 13, 9, 1, −5, 7}, {1, 9, 15, 3, −7, 13}, {1, −7, 5,13, −7, −15}, {1, 1, 9, −3, −11, 9}, {1, −11, −5, 1, 7, −5}, {1, −5,−11, 1, 11, −9}, {1, −9, 1, 11, −9, −15}, {1, 13, −9, 1, −5, −15}, {1,−5, 7, −15, −5, −15}, {1, −9, 11, −15, −15, −5}, {1, −9, −15, −5, 5,−15}, {1, −9, 13, −13, −3, −3}, {1, −9, 13, 1, 1, 11}, {1, −9, 1, 1, 7,−5}, {1, −11, −15, −3, 7, −13}, {1, −11, −13, −1, 9, −11}, {1, 3, 15,−13, 7, −3}, {1, −11, −7, 5, 7, −5}, {1, 11, 11, 1, −9, 9}, {1, 15, 7,−3, −3, 7}, {1, −9, 13, 13, −9, −1}, {1, 11, 11, 1, −7, 7}, {1, −11, −3,3, −9, −5}, {1, 7, 15, 3, −7, −3}, {1, 11, 7, −13, 13, 5}, {1, 13, 5,−1, 11, 7}, {1, −11, −3, 1, 7, −5}, {1, −11, −5, −1, 7, −5}, {1, −3,−11, 1, 11, −9}, {1, 13, −9, 3, −5, −9}, {1, 11, −1, −11, 9, 15}, {1,11, 13, −13, 7, −3}, {1, 11, −9, −15, 15, 5}, {1, 11, −9, 13, 11, 5},{1, −11, −3, 5, −7, −5}, {1, −7, −15, −3, 7, 5}, {1, −7, −15, −3, −5,5}, {1, −9, −7, 13, −11, −3}, {1, −7, −15, −15, −5, 5}, {1, 11, 11, 3,−5, 7}, {1, 13, −9, 1, −7, −15}, {1, 9, 9, −1, −11, 9}, {1, −9, −9, −1,7, −5}, {1, −9, −1, 7, 7, −5}, {1, −9, 13, 1, 1, 9}, {1, 13, 13, 5, −3,7}, {1, 15, 7, −1, −3, 7}, {1, 11, 9, 1, −7, 7}, {1, −9, −7, 1, 9, −5},{1, 3, −7, 15, 1, 9}, {1, −9, −15, −3, 5, −15}, {1, −5, −15, −15, −3,5}, {1, 1, 11, −15, 5, −3}, {1, −7, 13, −13, −3, −3}, {1, −7, 3, 13, −7,−15}, {1, −7, 5, 15, −7, −15}, {1, −9, 13, −11, −11, −3}, {1, −11, −3,−3, 5, −5}, {1, −11, −3, 3, −9, 13}, {1, −11, −7, 1, −11, −5}, {1, −7,−11, 1, 11, 5}, {1, −3, −11, 1, 11, 5}, {1, −11, −3, 1, −11, −5}, {1,11, 15, −13, 7, −3}, {1, 7, 15, 3, 7, −3}, {1, −9, −3, −15, −11, −3},{1, 5, 15, 3, −7, 13}, {1, 11, 7, −13, 11, 5}, {1, −9, −3, −15, −7, −3},{1, −3, −11, 1, −5, 5}, {1, −7, −11, 1, −5, 5}, {1, −3, 9, −13, −1,−11}, {1, −9, 3, 13, −7, −11}, {1, 13, 7, −1, 11, 7}, {1, −5, −11, 1,11, 5}, {1, −11, −5, 1, −11, −5}, {1, −9, −3, −15, −9, −3}, {1, −5, −11,1, −5, 5}, {1, 11, −11, 1, −5, −15}, {1, −9, −15, −3, 7, −15}, {1, 11,11, 1, −9, 11}, {1, 1, 11, −15, 5, −5}, {1, 9, 11, −1, −11, −3}, {1, 11,3, 15, 7, 5}, {1, 3, 11, −1, 7, −3}, {1, −7, 5, −3, 7, −13}, {1, −9,−11, 1, 11, 5}, {1, −1, −11, 1, 11, 5}, {1, −11, −9, 1, −11, −5}, {1,11, −1, −11, −5, 15}, {1, −11, −1, 1, −11, −5}, {1, −9, −3, −15, −5,−3}, {1, −1, −11, 1, −5, 5}, or {1, −9, −11, 1, −5, 5}.

According to a fourth aspect, a signal processing method is provided.The method includes:

When delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −7, 13, −13, −11, −3}, {1, −7, −9, −15, −3, 5}, {1, 5, 15, −15, 5,−3}, {1, 13, 11, 1, −3, 9}, {1, 11, 3, 15, 11, 5}, {1, −11, −3, 3, −9,−5}, {1, −11, −3, 3, −9, 13}, {1, −7, 3, 15, 11, 5}, {1, −3, 7, −13, 9,5}, {1, 11, 7, −13, 9, 5}, {1, 13, −9, 1, −9, −15}, {1, −9, 13, 1, 1,7}, {1, 3, 11, −1, −11, −3}, {1, 3, 11, −1, 7, −3}, {1, 9, −1, 7, 9,−3}, {1, 11, −11, 13, 15, −7}, {1, −7, 3, −5, −3, 7}, {1, 9, 7, −3, 5,−5}, {1, 13, 15, 7, −3, 5}, {1, −7, 3, 11, 9, −3}, {1, 13, −7, −5, −15,−7}, {1, −7, 13, 15, −3, 3}, {1, −13, −15, −3, 5, −9}, {1, 15, 11, −1,11, 7}, {1, −3, 11, 7, −5, 5}, {1, −13, −9, 3, −7, −3}, {1, 7, 7, −5,−15, −3}, {1, 11, 1, 11, −11, −9}, {1, −5, 5, −7, −11, 9}, or {1, −9, 1,3, −3, 7}; or

{1, 9, −15, −7, −15, 9}, {1, −5, 3, 13, −13, 11}, {1, 11, −13, 13, 3,−5}, {1, −5, 1, 9, −13, 11}, {1, −5, 5, 11, −13, 9}, {1, −7, −13, 9, 15,−9}, {1, −7, 3, 11, −15, 11}, {1, −9, −3, −9, −1, 9}, {1, 9, 3, 9, −1,−9}, {1, −5, −13, 9, −15, −9}, {1, −5, −13, 9, 15, −9}, {1, −5, −15, 9,15, −9}, {1, −9, 15, 9, −13, −5}, {1, −9, −15, 9, −13, −5}, {1, −7, 15,9, −13, −5}, {1, −9, −5, 5, 15, 11} {1, 11, 15, 5, −5, −9}, {1, −7, −15,9, −13, −5}, {1, −7, 1, 9, −15, 11}, {1, 9, −15, −7, −15, 11}, {1, 9,−15, −7, −13, 11}, {1, −7, −15, 9, 15, −9}, {1, −5, −13, −5, 3, 11}, {1,−7, −13, −5, 3, 11}, {1, 9, −15, 9, −1, −7}, {1, −5, 1, −11, 15, −7},{1, −5, 5, 15, −13, 11}, {1, 9, −13, 15, 5, −5}, {1, 9, 5, −5, −15, −9},{1, 9, −1, −11, −15, −9}, {1, 9, 15, 5, −5, −9}, {1, −9, −1, 9, 15, 11},{1, −5, 3, 13, 7, −5}, {1, −9, 15, −13, −3, 7}, {1, 7, −3, −13, 15, −9},{1, −7, −1, −13, 15, −7}, {1, 9, −13, 15, 3, 9}, {1, 9, 5, −5, −15, −7},{1, 9, −1, −11, −15, −7}, {1, 5, −9, −15, −3, 7}, {1, −13, −9, −15, −5,7}, {1, −5, 7, 15, 9, 15}, {1, −5, 3, 15, 9, −5}, {1, 9, 15, 9, −3,−11}, {1, 11, 7, 11, −3, −11}, {1, −11, −5, −11, −3, 9}, {1, −7, 3, 15,11, −3}, {1, 9, 3, 9, −3, −11}, {1, 11, 3, 7, −7, −11}, {1, 7, 15, −5,−13, 7}, {1, −3, 7, −13, 11, −3}, {1, 11, 3, −9, −15, −9}, {1, −9, −15,−3, 3, 11}, {1, 11, 5, −7, −1, −9}, {1, 7, −5, −11, −1, 9}, {1, −7, 3,13, −13, 13}, {1, −9, 13, −11, −5, 7}, {1, 9, 15, 7, −3, −11}, {1, 11,15, 9, −3, −11}, {1, 11, 3, −7, −15, −7}, {1, 11, 1, −9, −15, −5}, {1,11, 3, −9, −15, −7}, {1, 11, 5, 9, −3, −11}, {1, 7, 15, 7, −3, −11}, {1,11, 5, −5, −15, −5}, {1, 11, 5, −7, −15, −7}, {1, −11, −7, −11, −1, 11},{1, 11, 7, 11, −1, −11}, {1, 11, 15, 11, −1, −11}, {1, −11, −15, −11,−1, 11}, {1, 9, −15, 9, 5, −5}, {1, −7, −13, 11, −13, −5}, {1, 9, −15,9, 3, −5}, {1, 5, 3, 11, −11, 13}, {1, −9, −13, 11, −13, −5}, {1, −7, 3,11, −13, 13}, {1, −7, 3, 11, −13, 11}, {1, −7, −1, 7, −13, 11}, {1, −11,13, −9, −1, −3}, {1, −7, 1, 7, −13, 11}, {1, 11, −13, 13, 1, −7}, {1,−7, 13, 7, −15, −7}, {1, −11, −7, −13, −3, 9}, {1, 11, −13, 11, −1, −7},{1, 5, 15, −5, −13, 7}, {1, 11, 3, −7, −15, −5}, {1, 11, 1, −9, −15,−7}, {1, −9, 13, −9, −1, 7}, {1, −11, −15, −5, 1, 11}, {1, −11, −15, −9,1, 11}, {1, 11, 7, −5, −15, −5}, {1, 11, 5, 9, −1, −11}, {1, −9, −5,−11, −1, 11}, {1, 9, −15, −9, 13, 11}, {1, 7, 3, −9, 13, −9}, {1, 9, 15,−9, 13, 11}, {1, 7, 15, −9, 13, 11}, {1, −9, −15, −5, 3, 11}, {1, 11, 5,−5, −15, −7}, {1, 11, 3, −7, −1, −9}, or {1, 7, −3, −11, −1, 9}.

In another implementation of the fourth aspect, the sequence {s(n)} mayalternatively include at least one of the following sequences:

{1, −7, 13, −13, −11, −3}, {1, −7, −9, −15, −3, 5}, {1, 5, 15, −15, 5,−3}, {1, 13, 11, 1, −3, 9}, {1, 11, 3, 15, 11, 5}, {1, −11, −3, 3, −9,−5}, {1, −11, −3, 3, −9, 13}, {1, −7, 3, 15, 11, 5}, {1, −3, 7, −13, 9,5}, {1, 11, 7, −13, 9, 5}, {1, 13, −9, 1, −9, −15}, {1, −9, 13, 1, 1,7}, {1, 3, 11, −1, −11, −3}, {1, 3, 11, −1, 7, −3}, {1, 9, −1, 7, 9,−3}, {1, 11, −11, 13, 15, −7}, {1, −7, 3, −5, −3, 7}, {1, 9, 7, −3, 5,−5}, {1, 13, 15, 7, −3, 5}, {1, −7, 3, 11, 9, −3}, {1, 13, −7, −5, −15,−7}, {1, −7, 13, 15, −3, 3}, {1, −13, −15, −3, 5, −9}, {1, 15, 11, −1,11, 7}, {1, −3, 11, 7, −5, 5}, {1, −13, −9, 3, −7, −3}, {1, 7, 7, −5,−15, −3}, {1, 11, 1, 11, −11, −9}, {1, −5, 5, −7, −11, 9}, or {1, −9, 1,3, −3, 7}; or

{1, −11, 11, −1, 7, 13}, {1, −3, −13, 15, −5, 5}, {1, −11, 11, −1, 3,13}, {1, 13, −9, 3, −3, −13}, {1, −11, 11, −1, 7, 13}, {1, −3, 9, −13,−1, −9}, {1, 11, 13, 1, −9, 11}, {1, 11, −9, 13, 7, 5}, {1, 3, −9, 13,1, 11}, {1, 11, −9, 15, 7, 5}, {1, −11, −3, 5, 7, −5}, {1, 7, −15, 5,−5, 15}, {1, −5, −15, −3, 7, −13}, {1, 9, 13, 1, −9, 11}, {1, −7, −11,1, 11, −9}, {1, 9, −3, −13, 7, 11}, {1, 11, −9, −13, 13, 5}, {1, −9,−15, −3, 7, −13}, {1, −11, −9, 1, 7, −5}, {1, 9, −3, −13, 7, 9}, {1, 13,11, 3, −5, 7}, {1, 13, 9, 1, −5, 7}, {1, 9, 15, 3, −7, 13}, {1, −7, 5,13, −7, −15}, {1, 1, 9, −3, −11, 9}, {1, −11, −5, 1, 7, −5}, {1, −5,−11, 1, 11, −9}, {1, −9, 1, 11, −9, −15}, {1, 13, −9, 1, −5, −15}, {1,−5, 7, −15, −5, −15}, {1, −9, 11, −15, −15, −5}, {1, −9, −15, −5, 5,−15}, {1, −9, 13, −13, −3, −3}, {1, −9, 13, 1, 1, 11}, {1, −9, 1, 1, 7,−5}, {1, −11, −15, −3, 7, −13}, {1, −11, −13, −1, 9, −11}, {1, 3, 15,−13, 7, −3}, {1, −11, −7, 5, 7, −5}, {1, 11, 11, 1, −9, 9}, {1, 15, 7,−3, −3, 7}, {1, −9, 13, 13, −9, −1}, {1, 11, 11, 1, −7, 7}, {1, −11, −3,3, −9, −5}, {1, 7, 15, 3, −7, −3}, {1, 11, 7, −13, 13, 5}, {1, 13, 5,−1, 11, 7}, {1, −11, −3, 1, 7, −5}, {1, −11, −5, −1, 7, −5}, {1, −3,−11, 1, 11, −9}, {1, 13, −9, 3, −5, −9}, {1, 11, −1, −11, 9, 15}, {1,11, 13, −13, 7, −3}, {1, 11, −9, −15, 15, 5}, {1, 11, −9, 13, 11, 5},{1, −11, −3, 5, −7, −5}, {1, −7, −15, −3, 7, 5}, {1, −7, −15, −3, −5,5}, {1, −9, −7, 13, −11, −3}, {1, −7, −15, −15, −5, 5}, {1, 11, 11, 3,−5, 7}, {1, 13, −9, 1, −7, −15}, {1, 9, 9, −1, −11, 9}, {1, −9, −9, −1,7, −5}, {1, −9, −1, 7, 7, −5}, {1, −9, 13, 1, 1, 9}, {1, 13, 13, 5, −3,7}, {1, 15, 7, −1, −3, 7}, {1, 11, 9, 1, −7, 7}, {1, −9, −7, 1, 9, −5},{1, 3, −7, 15, 1, 9}, {1, −9, −15, −3, 5, −15}, {1, −5, −15, −15, −3,5}, {1, 1, 11, −15, 5, −3}, {1, −7, 13, −13, −3, −3}, {1, −7, 3, 13, −7,−15}, {1, −7, 5, 15, −7, −15}, {1, −9, 13, −11, −11, −3}, {1, −11, −3,−3, 5, −5}, {1, −11, −3, 3, −9, 13}, {1, −11, −7, 1, −11, −5}, {1, −7,−11, 1, 11, 5}, {1, −3, −11, 1, 11, 5}, {1, −11, −3, 1, −11, −5}, {1,11, 15, −13, 7, −3}, {1, 7, 15, 3, 7, −3}, {1, −9, −3, −15, −11, −3},{1, 5, 15, 3, −7, 13}, {1, 11, 7, −13, 11, 5}, {1, −9, −3, −15, −7, −3},{1, −3, −11, 1, −5, 5}, {1, −7, −11, 1, −5, 5}, {1, −3, 9, −13, −1,−11}, {1, −9, 3, 13, −7, −11}, {1, 13, 7, −1, 11, 7}, {1, −5, −11, 1,11, 5}, {1, −11, −5, 1, −11, −5}, {1, −9, −3, −15, −9, −3}, {1, −5, −11,1, −5, 5}, {1, 11, −11, 1, −5, −15}, {1, −9, −15, −3, 7, −15}, {1, 11,11, 1, −9, 11}, {1, 1, 11, −15, 5, −5}, {1, 9, 11, −1, −11, −3}, {1, 11,3, 15, 7, 5}, {1, 3, 11, −1, 7, −3}, {1, −7, 5, −3, 7, −13}, {1, −9,−11, 1, 11, 5}, {1, −1, −11, 1, 11, 5}, {1, −11, −9, 1, −11, −5}, {1,11, −1, −11, −5, 15}, {1, −11, −1, 1, −11, −5}, {1, −9, −3, −15, −5,−3}, {1, −1, −11, 1, −5, 5}, or {1, −9, −11, 1, −5, 5}.

According to a fifth aspect, a signal processing method is provided. Themethod includes:

When delta=0, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 3, 1, −5, 1, 7}, {1, −3, 3, 1, 7, −7}, {1, −5, 5, 5, −5, 1}, {1, 7,1, −1, 1, −5}, {1, 7, 1, −1, −7, −1}, {1, 5, 1, −7, −3, −5}, {1, 7, 1,−5, −3, 3}, {1, 5, 1, −1, 3, −7}, {1, 5, 1, −5, 7, −1}, {1, 3, 1, 7, −3,−7}, {1, 5, 1, −1, 3, −3}, {1, −3, 1, 5, −1, 3}, {1, −5, 1, 3, −7, 7},{1, −3, 1, −7, 7, −5}, {1, −3, 5, −7, −5, 5}, {1, 5, 1, −5, −1, −3}, {1,7, 5, −1, −7, −5}, {1, −3, 1, 5, 3, −7}, {1, −5, 5, 3, −7, −1}, {1, 5,1, 5, −5, −7}, {1, 3, 1, −5, 5, −7}, {1, 5, 1, −3, 1, 5}, {1, 7, 1, −5,−7, −1}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −5, −1, 3}, {1, −1, 1, −7, −3,7}, {1, −3, 1, 5, −7, 7}, {1, 5, 1, 7, −1, −3}, {1, −3, 1, −5, −1, 5},or {1, −7, 5, −1, −5, −3}; or

{1, 3, 1, −5, 1, 7}, {1, 3, 1, −5, 5, −7}, {1, 3, 1, 7, −3, −7}, {1, 3,1, −5, 7, −3}, {1, 5, 1, −5, −1, 3}, {1, 5, 1, −5, 1, 5}, {1, 5, 1, −3,1, 5}, {1, 5, 1, 5, −7, 5}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −3, 3, 7},{1, 5, 1, −1, 3, 7}, {1, 5, 1, 5, −5, 7}, {1, 5, 1, −1, 3, −7}, {1, 5,1, 5, −5, −7}, {1, 5, 1, −7, −3, −5}, {1, 5, 1, 5, −1, −5}, {1, 5, 1, 7,1, −3}, {1, 5, 1, −5, 1, −3}, {1, 5, 1, −1, 3, −3}, {1, 5, 1, −5, 7,−3}, {1, 5, 1, −5, −7, −3}, {1, 5, 1, −3, −7, −3}, {1, 5, 1, 7, −1, −3},{1, 5, 1, −7, −1, −3}, {1, 5, 1, −5, −1, −3}, {1, 5, 1, −5, 7, −1}, {1,7, 1, −5, −3, 3}, {1, 7, 1, −1, 1, −5}, {1, 7, 1, −5, −7, −1}, {1, 7, 1,−1, −7, −1}, {1, −5, 1, −1, 5, 7}, {1, −5, 1, 3, −7, 7}, {1, −3, 1, 5,−1, 3}, {1, −3, 1, −7, −1, 3}, {1, −3, 1, −5, −1, 3}, {1, −3, 1, −5, −1,5}, {1, −3, 1, 5, 3, 7}, {1, −3, 1, −1, 3, 7}, {1, −3, 1, 5, −7, 7}, {1,−3, 1, 3, −5, 7}, {1, −3, 1, 5, −5, 7}, {1, −3, 1, 5, 3, −7{ }, {1, −3,1, 5, 3, −5}, {1, −3, 1, −7, 7, −5}, {1, −1, 1, 5, −5, 7}, {1, −1, 1,−7, −3, 7}, {1, 5, 3, 7, −3, −7}, {1, 5, 3, 7, −1, −5}, {1, 7, 3, −5,−3, 3}, {1, 7, 3, −1, −7, −3}, {1, −3, 3, 7, −5, 5}, {1, −3, 3, 1, 7,−7}, {1, 7, 5, −1, −7, −5}, {1, −7, 5, 1, −5, −3}, {1, −7, 5, −1, −5,−3}, {1, −7, 5, 1, −5, −1}, {1, −5, 5, 5, −5, 1}, {1, −5, 5, 3, −7, −1},{1, −3, 5, 7, −5, 5}, {1, −3, 5, −7, −5, 5}, or {1, −3, 5, −7, −5, 7}.

According to a sixth aspect, a signal processing method is provided. Themethod includes:

When delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 5, 1, −5, 3, 3}, {1, −5, 1, 3, −3, 7}, {1, 7, 1, 7, −3, −5}, {1, 5,5, −5, 3, −1}, {1, 7, 1, 1, −3, 5}, {1, 7, 1, −1, 5, −5}, {1, 7, 1, −5,−3, −1}, {1, −1, 5, −7, −1, −1}, {1, 7, 1, −5, −3, 7}, {1, −3, 1, 1, −5,3}, {1, 1, 7, −7, 3, −1}, {1, 5, 1, 1, 7, −1}, {1, −5, 1, 7, 5, −5}, {1,−5, 1, 7, −3, −5}, {1, 7, 3, −1, 5, 5}, {1, 5, 1, 3, −1, 5}, {1, −3, 1,−5, 3, −7}, {1, −7, 5, −1, 3, −7}, {1, 5, 1, 7, −1, −7}, {1, 5, 1, −5,−5, 3}, {1, −5, 1, −1, 5, −5}, {1, −5, 1, 3, −3, −1}, {1, −3, 1, 5, −1,−5}, {1, −3, 1, −1, 3, −3}, {1, 7, 1, −5, 5, 7}, {1, 7, 1, 3, 5, −1},{1, 7, 3, −1, −1, 5}, {1, 7, 1, 7, 5, 3}, {1, 5, 1, −3, 3, 7}, or {1,−5, 3, 7, −3, −3}; or

{1, −5, 1, 3, −3, −1}, {1, −5, 1, 3, 5, −1}, {1, −5, 3, 7, −3, −3}, {1,−5, 3, −7, −3, −3}, {1, −3, 1, 1, −5, 3}, {1, −3, 1, 7, −1, −1}, {1, −3,1, 7, 7, −1}, {1, −3, 3, 7, −5, −3}, {1, −3, 3, 7, −3, −3}, {1, −3, 3,7, −1, −1}, {1, −3, 5, 5, −5, −1}, {1, −3, 5, −7, −5, −1}, {1, −3, 5,−7, −3, −1}, {1, −3, 5, −7, −1, −1}, {1, −1, 5, −7, −1, −1}, {1, 1, 5,−5, 3, −1}, {1, 1, 5, −1, −5, 3}, {1, 1, 5, −1, −5, 5}, {1, 1, 5, −7, 3,−1}, {1, 1, 7, −7, 3, −1}, {1, 3, 5, −1, −5, 5}, {1, 3, 5, −7, 3, −1},{1, 3, 7, −7, 3, −1}, {1, 5, 1, −5, −5, 3}, {1, 5, 1, −5, 3, 3}, {1, 5,1, −1, −5, 5}, {1, 5, 1, 1, 7, −1}, {1, 5, 1, 3, −1, 5}, {1, 5, 3, −1,−5, 5}, {1, 5, 5, −5, 3, −1}, {1, 5, 5, −1, −5, 3}, {1, 5, 5, −1, −5,5}, {1, 7, 1, −5, −3, −1}, {1, 7, 1, −1, −3, 3}, {1, 7, 1, −1, 5, 3},{1, 7, 1, 1, −3, 5}, {1, 7, 1, 3, 5, −1}, {1, 7, 1, 7, 5, 3}, {1, 7, 3,−3, −3, 5}, {1, 7, 3, −1, −1, 5}, {1, 7, 3, −1, 1, 5}, {1, 7, 3, −1, 5,5}, {1, 7, 3, 1, −3, 5}, {1, 7, 3, 1, −1, 5}, {1, 7, 3, 3, −3, 5}, {1,7, 3, 3, −1, 5}, {1, 7, 5, −1, −3, 3}, {1, 7, 5, −1, −1, 5}, {1, 7, 5,1, −3, 5}, {1, 7, 5, 1, −1, 5}, {1, −7, 3, −1, −1, 3}, {1, −7, 3, −1,−1, 5}, {1, −7, 3, 3, −1, 5}, {1, −7, 5, −1, 1, 5}, {1, −7, 5, −1, 3,5}, or {1, −7, 5, 1, −1, 5}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{32}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, −23, 21, −1, −3, 17}, {1, 19, −3, −23, −7, −27}, {1, −17, −13, 29,−3, 17}, {1, −21, 5, 25, 17, −21}, {1, 23, −19, −19, −29, −7}, {1, −11,13, 11, −31, −9}, {1, 7, −17, 5, 15, −9}, {1, 1, 11, −11, 13, −9}, {1,23, −1, −11, 15, −27}, {1, 23, 27, 7, 27, −17}, {1, −19, −27, −7, 11,−31}, {1, −3, −23, 21, −23, 21}, {1, 29, 9, 17, −1, 11}, {1, 27, 29, 5,−15, 23}, {1, −5, 17, −21, −29, 11}, {1, −17, −13, 9, −7, 11}, {1, −3,−25, −9, −27, 15}, {1, −19, 1, −11, −7, 13}, {1, 17, −27, 13, 9, −13},{1, −17, −11, 11, 31, −17}, {1, 19, 13, −9, −29, 19}, {1, −21, 31, −15,−23, −3}, {1, −21, −19, 19, 31, −9}, {1, 23, 31, 5, 15, −5}, {1, −23,17, 21, −19, 23}, {1, 21, 27, −15, −29, 17}, {1, 23, 23, 11, −29, −7},{1, −25, −3, −1, 13, −9}, {1, 21, −23, −21, 23, −21}, or {1, 21, 11, 31,11, 13}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 3, −11, 9, −5, −3}, {1, 9, −15, 13, 3, 11}, {1, −9, −13, −5, 3, −7},{1, −13, −15, 5, −9, −3}, {1, −13, 7, 5, −9, −3}, {1, −11, 7, 11, 9,15}, {1, −11, −1, 5, 15, 7}, {1, 11, 5, −7, −15, −5}, {1, 11, −1, −9,−15, −5}, {1, −11, 13, −9, −1, −7}, {1, 11, 3, −9, −1, −7}, {1, 9, −3,−11, −1, −7}, {1, −11, −3, 5, −1, 9}, {1, 9, −1, −5, −13, −5}, {1, −13,5, 5, 11, −3}, {1, −13, −9, 9, 15, 15}, {1, −9, 9, 5, 11, 15}, {1, 3, 3,−11, 7, 15}, {1, 5, 11, 7, −7, 15}, {1, 9, −5, 13, 13, 15}, {1, −11, −1,7, −3, 5}, {1, 9, −13, 7, 3, 11}, {1, 9, −15, 15, 5, −7}, {1, 11, 3,−11, −13, −5}, {1, −1, −15, −9, 9, −5}, {1, −13, −15, −9, 9, −5}, {1,−11, −5, 13, −1, −5}, {1, −13, 5, 11, −1, 5}, {1, −13, 5, −9, −1, 3}, or{1, −13, 5, −9, −11, −7}; or

{1, 3, −11, 9, −5, −3}, {1, 3, 7, −7, 13, −1}, {1, −13, −9, −7, −5, 13},{1, −11, 7, 11, 11, 15}, {1, −11, 7, 11, 15, 15}, {1, 1, 5, 9, −5, 15},{1, −13, −13, −11, −5, 13}, {1, 7, −7, 13, −1, 1}, {1, −11, 7, 13, 13,15}, {1, −13, −11, −5, −5, 13}, {1, 3, −11, 9, −5, −5}, {1, −11, 7, 13,15, 15}, {1, −11, −15, −7, 1, −7}, {1, 5, −9, 11, −3, −5}, {1, −13, −15,−11, −5, 13}, {1, −13, −15, 5, −9, −3}, {1, −13, 7, 5, −9, −3}, {1, 5,3, −11, 9, −5}, {1, −11, 7, 11, −15, 3}, {1, −7, 1, 9, 5, −7}, {1, 5,11, 9, −5, 15}, {1, −11, 7, 11, 9, 15}, {1, −13, 7, −7, −1, −3}, {1,−13, 7, 5, −9, −5}, {1, −11, −1, 5, 15, 7}, {1, 11, 5, −7, −15, −5}, {1,11, 3, −9, −15, −5}, {1, 11, −1, −9, −15, −5}, {1, −15, −9, −7, −5, 13},{1, 3, 9, 11, −5, 15}, {1, 11, −1, −7, −15, −5}, {1, 11, 5, −3, −15,−5}, {1, −15, −13, −7, −5, 13}, {1, 3, 5, 11, −5, 15}, {1, −13, −13, −5,−5, 13}, {1, −11, 13, −9, −1, −7}, {1, 11, 5, −3, −15, −7}, {1, 11, 5,−7, −15, −7}, {1, −9, −15, −5, 1, 11}, {1, 11, 3, −9, −1, −7}, {1, 7, 7,11, −3, −15}, {1, −15, −11, −7, −5, 13}, {1, 5, 7, 11, −5, 15}, {1, −11,−3, 5, 15, 7}, {1, −5, −15, −5, 1, 11}, {1, 9, −1, −5, −13, −5}, {1,−11, 5, 11, 15, 15}, {1, 7, 11, −5, 15, 1}, {1, 9, 3, 11, 3, −9}, {1,−7, −11, 11, −13, −7}, {1, 1, 7, −9, 11, −3}, {1, 5, 11, −5, 15, 1}, {1,−13, 13, −9, −3, 7}, {1, −15, −11, −5, −5, 13}, {1, 11, 5, −5, −15, −5},{1, −11, 5, 9, 9, 15}, {1, 7, 7, 11, −5, 15}, {1, 3, 7, 11, −5, 15}, {1,9, 15, −9, −13, 11}, {1, −9, 15, 11, −13, −7}, {1, 9, 1, 9, 3, −9}, {1,11, −1, −7, 1, −7}, {1, −11, 5, 9, 11, 15}, {1, −13, 7, −9, −7, 1}, {1,11, −1, −9, −1, −7}, {1, 9, 11, −5, 15, 1}, {1, −11, 15, 7, −15, −7},{1, 9, 1, −11, 15, −7}, {1, −7, −13, −3, 5, 13}, {1, −7, −15, −5, 1,11}, {1, 11, 3, −5, −15, −5}, {1, 11, 5, −5, −15, −7}, {1, 11, 3, −7,−15, −5}, {1, −9, 1, 9, 3, 11}, {1, −9, −15, −5, 3, 11}, {1, −9, −1, −7,1, 11}, {1, −9, −15, 11, −13, −7}, {1, −5, −11, 11, −13, −7}, {1, −13,5, 5, 11, −3}, {1, −13, −9, 9, 15, 15}, {1, −13, 5, 11, −3, 1}, {1, −13,−13, −9, 9, 15}, {1, −11, −13, 9, −15, −9}, {1, −11, −13, 9, −13, −7},{1, 7, 15, 5, 3, −9}, {1, −11, −13, −5, 1, 11}, {1, 3, −11, 9, −5, −7},{1, 9, 7, −5, −15, −5}, {1, 11, −1, −11, −13, −5}, {1, −11, −1, 5, 13,11}, {1, −13, 7, −7, −5, 3}, {1, −1, −13, −5, 1, 11}, {1, −3, −15, −5,1, 11}, {1, 11, 7, −5, −15, −5}, {1, 11, 7, −3, −15, −5}, {1, −15, −9,−11, −5, 11}, {1, −13, −7, −11, −7, 11}, {1, 11, −1, −11, −15, −5}, {1,3, −11, −3, −3, 15}, {1, 11, −1, −5, −15, −5}, {1, 9, −1, −11, −13, −5},{1, −11, −15, −5, 1, 11}, {1, 3, 3, −11, 7, 15}, {1, 9, 3, 11, −3, −9},{1, −9, 13, −11, −13, −7}, {1, 9, 15, −9, 13, 11}, {1, −9, −1, 5, 13,11}, {1, −5, 3, 11, −11, 15}, {1, −13, 9, −5, −1, −5}, {1, 9, −13, 13,−1, 7}, {1, −1, 7, −3, −13, −5}, {1, 3, −11, 7, 7, 15}, {1, 9, −5, 13,13, 15}, {1, −13, 13, −9, −1, 7}, {1, 11, 7, −7, −15, −5}, {1, 11, 3,−11, −15, −5}, {1, −11, −3, 5, 15, 5}, {1, −11, −1, 7, −3, 5, 1, −11,−1, −11, −3, 5}, {1, 11, 1, −11, −3, −7}, {1, 11, −1, −11, −3, −7}, {1,11, −1, −11, −15, −7}, {1, 11, −1, −5, −15, −7}, {1, −11, −1, —5, 3,11}, {1, 11, −1, −5, 3, 11}, {1, −11, −15, −5, 3, 11}, {1, −11, −3, 5,15, 11}, {1, 9, −13, 7, 3, 11}, {1, −11, −3, 5, 1, 11}, {1, −3, 7, −5,−15, −7}, {1, 9, −13, 15, 3, −7}, {1, −11, −1, 7, 3, 11}, {1, −11, −15,−7, 1, 11}, {1, −11, −1, 7, 15, 5}, {1, −11, −1, 7, 15, 11}, {1, 11,−13, −5, 15, 11}, {1, −9, 1, −3, 5, 13}, {1, −9, 1, 9, −15, 13}, {1, 9,−3, −13, −3, 5}, {1, −9, −13, −3, 5, 13}, {1, −11, −5, −9, −3, 13}, {1,7, 13, 9, −3, −15}, {1, −11, 5, 11, 7, 13}, {1, −11, −15, −9, −3, 13},{1, 9, −15, 15, 3, 11}, {1, 9, −15, 15, 5, −7}, {1, 9, −15, 15, −9, 13},{1, 9, −1, 7, −5, −7}, {1, −11, −13, −5, 3, 11}, {1, −1, −11, −3, −15,−7}, {1, −1, 7, 15, 3, 11}, {1, 9, −15, 15, 3, −7}, {1, −11, −3, −5, 3,11}, {1, −1, 7, −5, −15, −7}, {1, −1, 7, 15, 3, −7}, {1, 9, −15, −7, 13,3}, {1, −11, 5, 11, 9, 15}, {1, 7, 13, 11, −3, −15}, {1, −1, 5, 11, −3,−15}, {1, 7, 5, −11, 9, −5}, {1, 7, 5, 11, −5, 15}, {1, −15, 5, −9, −11,−5}, {1, −11, 5, 9, 7, 15}, {1, −11, −13, 11, −13, −7}, {1, 9, −13, 15,1, −7}, {1, −11, 7, 11, 7, 13}, {1, 11, 3, −11, −3, −7}, {1, 11, 3, −11,−15, −7}, {1, −7, 3, 11, −13, 15}, {1, 11, 3, −11, −3, 5}, {1, −11, 5,13, 11, 15}, {1, 5, −11, −13, 5, −7}, {1, −1, 7, 13, −11, 13}, {1, 5,13, 11, −3, −15}, {1, −3, −15, 3, 7, 13}, {1, −1, −13, 3, 7, 15}, {1, 9,−7, 13, −1, 3}, {1, −7, 1, −13, 15, −7}, {1, 9, −13, 15, 1, 9}, {1, −13,7, −5, 1, −3}, {1, −1, 7, 11, −3, −15}, {1, −7, 3, 11, 7, 15}, {1, −11,7, 13, 9, 13}, {1, 9, 1, −13, 15, −7}, {1, −11, −15, −9, −5, 13}, {1, 9,7, −9, 11, −3}, {1, −11, 7, 3, 9, 13}, {1, 9, 13, −3, −15, 15}, {1, −1,−13, 11, −13, −7}, {1, −15, 5, −9, −11, −3}, {1, −1, 3, −13, 7, −7}, {1,9, −5, −13, −3, −7}, {1, 5, −9, 11, 7, −5}, {1, 9, 1, −1, −13, −5}, {1,5, 1, 7, −7, 13}, {1, −11, 7, 11, −15, 13}, {1, 5, 1, −11, 9, −5}, {1,−13, 7, −5, −9, −5}, {1, −13, 7, −5, −1, 5}, {1, 9, −3, 15, 13, −3}, {1,11, 3, −11, −13, −5}, {1, −7, 3, 9, −15, 15}, {1, −11, −15, −7, −3, 13},{1, 5, 13, 9, −3, −15}, {1, −13, −15, −9, 9, 15}, {1, −1, 5, 11, −3,15}, {1, −13, 5, 3, −11, −5}, {1, −1, −15, −9, 9, −5}, {1, −13, 5, 11,−3, 3}, {1, 7, 13, 11, −3, 15}, {1, −13, −7, −1, −15, 15}, {1, −13, −15,−9, 9, −5}, {1, 7, −5, 13, −13, 15}, {1, −3, 15, 3, −11, −5}, {1, −13,−7, −11, 7, −5}, {1, −11, −5, 13, −1, −5}, {1, −13, 5, 11, −1, 5}, {1,7, −7, 13, −13, 5}, {1, −11, −5, 1, −3, 15}, {1, −11, 7, −7, −11, −5},{1, −13, −7, −11, −5, 13}, {1, −3, 3, 9, −5, 15}, {1, 7, −5, 13, 9, 15},{1, −13, −5, −7, 11, −3}, {1, −13, 5, −9, −11, −3}, {1, −13, 5, 3, −11,−3}, {1, −1, −15, −11, −3, 15}, {1, 9, −5, 13, 11, 15}, {1, 5, −9, 9, 7,15}, {1, 9, −5, −7, 11, −3}, {1, −1, −15, 3, 11, 15}, {1, 5, 13, 11, −3,15}, {1, 5, 3, −11, 7, 15}, {1, −13, 5, −9, −1, 3}, {1, −13, 5, −9, −11,−7}, {1, −13, −5, 13, 11, 15}, {1, 5, 3, −11, −3, 15}, {1, 7, 15, 3, 1,−11}, {1, −11, −3, 3, 15, 3}, {1, 7, 15, 13, 1, −11}, {1, −11, −13, −5,1, 13}, {1, −11, −13, −7, 1, 13}, {1, −11, 1, 9, 15, 13}, {1, 13, 3,−11, −5, −7}, {1, 7, −15, 7, −5, −5}, {1, −13, −15, −5, −3, 13}, {1,−11, 11, −11, −5, 1}, {1, −9, 3, 9, −15, 15}, {1, −13, −15, −9, −1, 11},{1, 3, 13, 11, −3, −15}, {1, −9, 3, 11, −15, 15}, {1, −1, 5, −9, 13,−7}, or {1, 13, 3, −11, −13, −5}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on a preset condition and asequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, −7, −7, −3, −1, 7}, {1, 5, 5, −3, 5, 7}, {1, 5, −3, −5, 1, 5}, {1,7, −7, −1, −3, 7}, {1, −1, 1, −5, −3, 7}, {1, 7, 3, −5, −1, −3}, {1, 7,−7, −1, −7, 7}, {1, −5, −3, −5, 5, −1}, {1, 5, 7, 7, −1, 7}, {1, −7, 3,3, −5, −1}, {1, 7, −1, 3, −1, −3}, {1, −1, 1, −7, 3, −3}, {1, 1, −5, 3,5, −7}, {1, −1, 5, 1, −7, −3}, {1, 5, −7, 5, −5, 5}, {1, 5, 1, 1, −5,−1}, {1, 5, −7, 7, 1, 5}, {1, 5, −7, 1, −3, 3}, {1, −5, 3, 3, 7, −1},{1, 3, −5, −1, −1, 7}, {1, −7, −5, −7, −3, 7}, {1, −1, −5, −1, −7, −3},{1, −5, 5, 3, −7, −5}, {1, −7, 3, 7, −1, −1}, {1, −3, 5, 3, −7, −3}, {1,−7, −5, 5, −3, 1}, {1, −5, 5, −5, −1, −1}, {1, 3, −3, 1, −7, 1}, {1, −1,7, 3, 7, −5}, or {1, 1, 5, −3, 7, −7}; or

{1, −5, 3, 3, 5, −3}, {1, −1, 3, −5, 5, −1}, {1, 5, 1, 1, −5, −1}, {1,−1, 1, −5, −3, 7}, {1, −5, 3, 3, 7, −1}, {1, −1, 7, 3, 7, −5}, {1, −7,−7, −3, −1, 7}, {1, 5, 5, −3, 7, −1}, {1, −5, 5, 3, 7, −7}, {1, 1, 5,−3, 7, −7}, {1, 5, −5, 5, −1, −1}, {1, −1, 3, 5, −1, −7}, {1, −7, 3, 7,−1, −1}, {1, 3, −5, 5, 1, −3}, {1, −7, 3, 3, −5, −1}, {1, 1, −3, 1, 3,7}, {1, −5, 1, 5, 7, 7}, {1, −1, −7, 3, −5, −3}, {1, 1, −7, 3, 7, −1},{1, 5, −1, 1, 1, −7}, {1, 7, −7, −3, 7, 7}, {1, −7, −7, −3, 7, −7}, {1,5, 7, 1, 1, −5}, {1, 1, 3, 7, −1, −7}, {1, 5, 5, −3, 5, 7}, {1, −5, 3,7, −7, 1}, {1, −1, 1, −7, 3, −3}, {1, −5, 3, 5, −7, 5}, {1, −3, 5, 3,−7, −3}, {1, −1, 5, 1, −7, −3}, {1, 1, −5, −1, 7, −1}, {1, −7, −5, 5,−3, 1}, {1, −5, 1, 3, 7, 7}, {1, 3, −3, 7, −1, 3}, {1, −7, −5, −7, −3,7}, {1, 5, 7, −3, 7, 7}, {1, −7, 3, −3, −1, 3}, {1, 3, −5, 3, 7, 1}, {1,−7, 3, 1, −5, −1}, {1, 1, −5, 3, 5, −7}, {1, 5, −7, 1, −3, 3}, {1, −1,3, 7, −3, −7}, {1, 3, −7, 3, −3, −3}, {1, −1, −7, 1, 3, 7}, {1, 1, 3, 7,1, −7}, {1, 3, −5, −1, −1, 7}, {1, −5, −3, −5, 5, −1}, {1, −7, −5, −5,−1, 7}, {1, 1, −7, −5, −1, 7}, {1, 5, −7, 7, −1, −5}, {1, 7, 1, 1, −5,−3}, {1, 5, 7, 7, −1, 7}, {1, −7, 3, −5, −1, 1}, {1, −5, 5, −5, −1, −1},{1, 7, 1, −5, −3, −3}, {1, 3, −3, 1, −7, 1}, {1, 1, 3, −5, 5, −3}, or{1, 3, 3, −5, −1, −7}.

According to a seventh aspect, a sequence-based signal processing methodis provided. The method includes:

determining a sequence {x_(n)}, where x_(n) is an element in thesequence {x_(n)} the sequence {x_(n)} is a sequence satisfying a presetcondition, and the preset condition is:

the preset condition is x_(n)=y_((n+M)mod K), where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, j=√{squareroot over (−1)}, and a set of a sequence {s_(n)}, including an elements_(n) includes at least one of sequences in a first sequence set, where

the sequences in the first sequence set include:

{1, 1, 3, −7, 5, −3}, {1, 1, 5, −7, 3, 5}, {1, 1, 5, −5, −3, 7}, {1, 1,−7, −5, 5, −7}, {1, 1, −7, −3, 7, −7}, {1, 3, 1, 7, −1, −5}, {1, 3, 1,−7, −3, 7}, {1, 3, 1, −7, −1, −5}, {1, 3, 3, 7, −1, −5}, {1, 5, 1, 1,−5, −3}, {1, 5, 1, 3, −5, 5}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 3, −3, 1},{1, 5, 1, 3, −1, −7}, {1, 5, 1, 5, 3, −7}, {1, 5, 1, 5, 3, −5}, {1, 5,1, 5, 7, 7}, {1, 5, 1, 5, −5, 3}, {1, 5, 1, 5, −3, 3}, {1, 5, 1, 5, −1,3}, {1, 5, 1, 5, −1, −1}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, −5, 5}, {1,5, 1, −5, 3, 5}, {1, 5, 1, −5, −7, −1}, {1, 5, 1, −5, −5, −3}, {1, 5, 1,−5, −3, 1}, {1, 5, 1, −5, −1, 1}, {1, 5, 1, −5, −1, 5}, {1, 5, 1, −5,−1, −1}, {1, 5, 1, −3, 1, 7}, {1, 5, 1, −3, 1, −5}, {1, 5, 1, −3, 7,−7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1, 5, 1, −1, 3, −5},{1, 5, 1, −1, 5, −7}, {1, 5, 1, −1, −7, −3}, {1, 5, 1, −1, −5, −3}, {1,5, 3, −3, −7, −5}, {1, 5, 3, −3, −7, −1}, {1, 5, 3, −3, −1, −7}, {1, 5,3, −1, 5, −7}, {1, 5, 3, −1, −5, −3}, {1, 5, 5, 1, 3, −3}, {1, 5, 5, −1,−7, −5}, {1, 7, 1, 1, 1, −5}, {1, 7, 1, 1, −7, −7}, {1, 7, 1, 1, −5,−5}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, −7, 1, 1}, {1,7, 1, −7, −7, −7}, {1, 7, 1, −5, 1, 1}, {1, 7, 1, −5, −5, 1}, {1, 7, 1,−5, −3, 1}, {1, 7, 1, −5, −1, 1}, {1, 7, 1, −5, −1, −1}, {1, 7, 1, −1,5, 7}, {1, 7, 3, 1, 5, −3}, {1, 7, 3, 1, −5, −5}, {1, 7, 3, 5, −5, −7},{1, 7, 3, −7, 7, −1}, {1, 7, 3, −7, −5, 3}, {1, 7, 3, −5, −7, −1}, {1,7, 3, −3, −5, 1}, {1, 7, 3, −3, −5, −1}, {1, 7, 3, −3, −3, −3}, {1, 7,3, −1, −5, −3}, {1, 7, 5, 1, −5, −5}, {1, 7, 5, 1, −5, −3}, {1, 7, 5,−5, 3, −1}, {1, 7, 5, −5, −3, −7}, {1, 7, 5, −3, −7, 1}, {1, 7, 5, −1,−5, −5}, {1, 7, 5, −1, −5, −3}, {1, −7, 1, −5, 1, 1}, {1, −7, 3, 3, −5,−5}, {1, −7, 3, 5, −1, −3}, {1, −7, 3, −5, 1, 1}, {1, −7, 3, −5, −5, 1},{1, −7, 3, −5, −5, −5}, {1, −7, 5, −3, −5, 1}, {1, −5, 1, 1, 3, 7}, {1,−5, 1, 1, 5, 7}, {1, −5, 1, 1, 7, 7}, {1, −5, 1, 3, 3, 7}, {1, −5, 1, 7,5, −1}, {1, −5, 1, 7, 7, 1}, {1, −5, 1, −7, −7, 1}, {1, −5, 1, −7, −7,−7}, {1, −5, 3, −7, −7, 1}, {1, −5, 5, 3, −5, −3}, {1, −5, 5, 3, −5,−1}, {1, −5, 5, 5, −5, −3}, {1, −5, 5, 5, −5, −1}, {1, −5, 5, 7, −5, 1},{1, −5, 5, 7, −5, 3}, {1, −5, 5, −7, −5, 1}, {1, −5, 5, −7, −5, 3}, {1,−5, 7, 3, 5, −3}, {1, −5, −7, 3, 5, −3}, {1, −5, −7, 3, 5, −1}, {1, −5,−7, 3, 7, −1}, {1, −3, 1, 1, 3, 7}, {1, −3, 1, 1, 5, 7}, {1, −3, 1, 1,5, −1}, {1, −3, 1, 3, 3, 7}, {1, −3, 1, 3, −7, 7}, {1, −3, 1, 5, 7, 1},{1, −3, 1, 5, 7, 3}, {1, −3, 1, 5, 7, 7}, {1, −3, 1, 5, −7, 3}, {1, −3,1, 7, −5, 5}, {1, −3, 1, 7, −1, 3}, {1, −3, 1, −7, 3, −1}, {1, −3, 1,−7, 7, −1}, {1, −3, 1, −7, −5, 5}, {1, −3, 1, −7, −3, 3}, {1, −3, 1, −5,7, −1}, {1, −3, 3, 3, −7, 7}, {1, −3, 3, 5, −5, −7}, {1, −3, 3, 7, 7,7}, {1, −3, 3, 7, −7, 5}, {1, −3, 3, −7, −7, 3}, {1, −3, 3, −5, −7, −1},{1, −3, 7, −5, 3, 5}, {1, −1, 1, 7, 3, −7}, {1, −1, 1, 7, 3, −5}, {1,−1, 1, −5, 5, −7}, {1, −1, 3, −7, −5, 7}, {1, −1, 5, −7, −5, 5}, {1, −1,5, −7, −5, 7}, {1, −1, 5, −5, −5, 5}, and {1, −1, 5, −5, −5, 7};

{1, 1, 5, −7, 3, 7}, {1, 1, 5, −7, 3, −3}, {1, 1, 5, −1, 3, 7}, {1, 1,5, −1, −7, −3}, {1, 3, 1, 7, −1, −7}, {1, 3, 1, −7, 1, −5}, {1, 3, 1,−7, 3, −5}, {1, 3, 1, −7, −1, −7}, {1, 3, 1, −5, 1, −7}, {1, 3, 1, −5,3, −7}, {1, 3, 5, −7, 3, 7}, {1, 3, 5, −1, 3, 7}, {1, 3, 5, −1, 3, −3},{1, 3, 5, −1, −5, 7}, {1, 3, 7, 1, 5, 7}, {1, 3, 7, −7, 3, 7}, {1, 3, 7,−5, 5, 7}, {1, 5, 1, 1, 5, −7}, {1, 5, 1, 1, 5, −3}, {1, 5, 1, 5, 5,−7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1,5, 1, 5, −3, 1}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 5, −1, 3}, {1, 5, 1, 7,−3, −5}, {1, 5, 1, −7, 1, −3}, {1, 5, 1, −7, −3, 5}, {1, 5, 1, −5, 5,7}, {1, 5, 1, −5, −3, 7}, {1, 5, 1, −3, 1, −7}, {1, 5, 1, −3, 5, −7},{1, 5, 1, −3, 7, −7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1,5, 3, 1, 5, −7}, {1, 5, 3, 1, 5, −3}, {1, 5, 3, 7, −3, −5}, {1, 5, 3, 7,−1, 3}, {1, 5, 3, −7, −3, 7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −1, −5,−3}, {1, 5, 5, −1, 3, 7}, {1, 5, 5, −1, 3, −3}, {1, 5, 7, 1, 3, −3}, {1,5, −7, −3, 7, 7}, {1, 7, 1, 1, 3, −5}, {1, 7, 1, 1, −7, −5}, {1, 7, 1,1, −1, −7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −5,−5}, {1, 7, 1, 3, −1, −5}, {1, 7, 1, 5, −1, −3}, {1, 7, 1, 7, −7, −7},{1, 7, 1, 7, −1, −1}, {1, 7, 1, −7, 1, −1}, {1, 7, 1, −7, −5, −5}, {1,7, 1, −7, −1, 1}, {1, 7, 1, −7, −1, −1}, {1, 7, 1, −5, −7, 1}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −5, −5, 3}, {1, 7, 1, −5, −1, 3}, {1, 7, 1, −5,−1, −3}, {1, 7, 1, −3, −7, −5}, {1, 7, 1, −3, −7, −1}, {1, 7, 1, −3, −1,5}, {1, 7, 1, −1, 1, −7}, {1, 7, 1, −1, 7, −7}, {1, 7, 1, −1, −7, −3},{1, 7, 3, 1, 7, −5}, {1, 7, 3, 1, 7, −3}, {1, 7, 3, 5, −1, −5}, {1, 7,3, −7, 7, −3}, {1, 7, 3, −7, −3, 3}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, −7, −5}, {1, 7, 3, −3, −7, −1}, {1, 7, 3, −3, −1, −5}, {1, 7, 3, −1,−7, −5}, {1, 7, 5, −1, 3, −3}, {1, 7, 5, −1, −7, −7}, {1, 7, 5, −1, −7,−3}, {1, −7, 1, 3, −3, 3}, {1, −7, 1, −7, 1, 1}, {1, −7, 3, 1, 7, −1},{1, −7, 3, 1, −7, −5}, {1, −7, 3, 1, −7, −1}, {1, −7, 3, 3, −3, −5}, {1,−7, 3, 5, −3, −5}, {1, −7, 3, −5, −7, −1}, {1, −7, 3, −5, −3, 3}, {1,−7, 3, −3, −3, 3}, {1, −7, 5, 1, −7, −3}, {1, −5, 1, 1, 3, −7}, {1, −5,1, 1, −7, 7}, {1, −5, 1, 3, 3, −7}, {1, −5, 1, 3, −7, 5}, {1, −5, 1, 5,3, 7}, {1, −5, 1, 5, 3, −3}, {1, −5, 1, 5, −7, 3}, {1, −5, 1, 5, −7, 7},{1, −5, 1, 7, 3, −1}, {1, −5, 1, 7, 5, −1}, {1, −5, 1, 7, 7, −7}, {1,−5, 1, 7, 7, −1}, {1, −5, 1, 7, −7, 1}, {1, −5, 1, 7, −7, 5}, {1, −5, 1,7, −1, 1}, {1, −5, 1, −7, 3, 1}, {1, −5, 1, −7, 7, −7}, {1, −5, 1, −7,7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −7, −5, 3}, {1, −5, 1, −3, 3,5}, {1, −5, 1, −1, 3, 7}, {1, −5, 1, −1, 7, 7}, {1, −5, 3, 1, 7, 7}, {1,−5, 3, 5, −5, 3}, {1, −5, 3, 5, −3, 3}, {1, −5, 3, −7, 7, 1}, {1, −5, 3,−7, 7, −1}, {1, −5, 3, −7, −5, 3}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1,−5, −3}, {1, −5, 5, 3, −7, 1}, {1, −5, 5, 3, −7, −3}, {1, −5, 5, 7, 3,−3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −1, 3, 5}, {1, −5, 7, 1, 3, −3},{1, −5, 7, 1, 3, −1}, {1, −5, 7, 1, 5, −1}, {1, −5, −7, 3, 3, −3}, {1,−5, −7, 3, 7, 1}, {1, −5, −7, 3, 7, −3}, {1, −3, 1, 5, −3, 1}, {1, −3,1, 7, 5, −5}, {1, −3, 1, 7, −5, 5}, {1, −3, 1, −7, −5, 5}, {1, −3, 1,−7, −3, 1}, {1, −3, 1, −7, −3, 5}, {1, −3, 1, −5, −3, 7}, {1, −3, 3, 7,−3, 3}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −5, 7}, {1, −3, 3, −7, −3,3}, {1, −1, 1, 7, −1, −7}, {1, −1, 1, −7, 3, −5}, {1, −1, 1, −7, −1, 7},{1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, −5}, and {1, −1, 5, −7, 3, 7};

{1, 1, 5, −5, 3, −3}, {1, 1, 7, −5, 7, −1}, {1, 1, 7, −1, 3, −1}, {1, 1,−5, 3, −1, 3}, {1, 1, −5, 7, −5, 3}, {1, 1, −3, 7, −1, 5}, {1, 3, 7, −5,3, −3}, {1, 3, −1, −7, 1, 5}, {1, 5, 1, −7, 3, 3}, {1, 5, 1, −5, −5, 1},{1, 5, 3, −1, −5, 3}, {1, 5, 5, 1, −5, 3}, {1, 5, 7, 3, −3, 5}, {1, 5,−7, 1, −5, 7}, {1, 5, −7, −5, 7, 1}, {1, 5, −5, 3, −3, −7}, {1, 5, −5,3, −1, −5}, {1, 5, −5, −5, 5, −3}, {1, 5, −3, 3, 3, −3}, {1, 5, −3, 7,3, 5}, {1, 7, 7, 1, −7, 5}, {1, 7, 7, 1, −3, 1}, {1, 7, −5, 7, −1, −7},{1, 7, −5, −7, 5, 1}, {1, 7, −5, −5, 7, 1}, {1, 7, −1, 3, −1, −7}, {1,7, −1, −7, 5, 5}, {1, 7, −1, −5, 7, 5}, {1, −7, 3, 3, −7, −3}, {1, −7,3, −1, 1, 5}, {1, −7, 5, 1, −1, 3}, {1, −7, 5, −7, −1, −1}, {1, −7, −3,1, 3, −1}, {1, −7, −3, −7, 3, 3}, {1, −7, −1, 3, 3, −1}, {1, −7, −1, −1,−7, 5}, {1, −5, 3, 7, −5, −3}, {1, −5, 3, −1, 3, −7}, {1, −5, 7, 7, −5,1}, {1, −5, 7, −7, −3, 1}, {1, −5, 7, −5, 3, −7}, {1, −5, −5, 1, 5, 1},{1, −5, −5, 1, −7, −3}, {1, −3, 1, 7, 7, 1}, {1, −3, 1, −7, −1, −1}, {1,−3, 5, −5, −1, −3}, {1, −3, 5, −1, −1, 5}, {1, −3, 7, 7, −3, 5}, {1, −3,7, −1, 3, 7}, {1, −3, 7, −1, 5, −7}, {1, −3, −7, 1, 7, −5}, {1, −3, −7,7, −5, 1}, {1, −3, −3, 1, 7, −1}, {1, −3, −1, 3, 7, −1}, {1, −1, 3, −7,1, −3}, and {1, −1, −5, 7, −1, 5};

{1, 3, 7, −5, 1, −3}, {1, 3, −7, 5, 1, 5}, {1, 3, −7, −3, 1, −3}, {1, 3,−1, −5, 1, 5}, {1, 5, 1, −3, 3, 5}, {1, 5, 1, −3, 7, 5}, {1, 5, 1, −3,−5, 5}, {1, 5, 1, −3, −1, 5}, {1, 5, 3, −3, −7, 5}, {1, 5, 7, 3, −1, 5},{1, 5, 7, −3, −7, 5}, {1, 5, −7, 3, 1, −3}, {1, 5, −7, 5, 1, 7}, {1, 5,−7, 7, 3, −1}, {1, 5, −7, −5, 1, −3}, {1, 5, −7, −1, 1, −3}, {1, 5, −5,7, 3, 5}, {1, 5, −5, −3, −7, 5}, {1, 5, −1, −5, 7, 5}, {1, 5, −1, −3,−7, 5}, {1, 7, 3, −1, 3, 7}, {1, 7, −7, 5, 1, 5}, {1, 7, −7, −3, 1, −3},{1, 7, −5, −1, 1, −3}, {1, −5, 7, 3, 1, 5}, {1, −5, −7, 5, 1, 5}, {1,−3, 1, 5, 7, −3}, {1, −3, 1, 5, −5, −3}, {1, −3, 3, 5, −7, −3}, {1, −3,−7, 3, 1, 5}, {1, −3, −7, 7, 1, 5}, {1, −3, −7, −5, 1, 5}, {1, −3, −7,−3, 1, −1}, {1, −3, −7, −1, 1, 5}, {1, −3, −5, 5, −7, −3}, {1, −3, −1,3, 7, −3}, {1, −3, −1, 5, −7, −3}, {1, −1, 3, 7, 3, −1}, {1, −1, −7, 5,1, 5}, and {1, −1, −5, 7, 1, 5};

{1, 3, −3, 1, 3, −3}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 3, 7}, {1,3, −3, −7, −5, 5}, {1, 3, −3, −1, 3, −3}, {1, 5, −1, −7, 3, 7}, {1, 7,3, 1, 5, −1}, {1, 7, 3, 1, 7, 5}, {1, 7, 3, 1, −5, −1}, {1, 7, 3, 1, −3,3}, {1, 7, 3, 5, −7, 3}, {1, 7, 3, 5, −1, 3}, {1, 7, 3, 7, 1, 3}, {1, 7,3, −7, 3, 7}, {1, 7, 3, −7, 5, −5}, {1, 7, 3, −7, 7, −3}, {1, 7, 3, −7,−3, 7}, {1, 7, 3, −7, −1, −3}, {1, 7, 3, −3, 1, −5}, {1, 7, 3, −3, 7,−5}, {1, 7, 3, −1, −7, −5}, {1, 7, 5, 1, 7, 5}, {1, 7, 5, −7, −1, −3},{1, 7, 5, −1, −7, −3}, {1, −5, −3, 1, −5, −3}, {1, −5, −3, 7, −5, 5},{1, −5, −3, −7, 3, 5}, {1, −5, −3, −7, 3, 7}, {1, −5, −3, −1, 3, −3},{1, −3, 3, 1, 3, −3}, {1, −3, 3, 1, 5, −1}, {1, −3, 3, 1, −5, −1}, {1,−3, 3, 5, −7, 3}, {1, −3, 3, 5, −1, 3}, {1, −3, 3, 7, −3, −5}, {1, −3,3, −7, 3, 7}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −3, 7}, {1, −3, 3,−3, 7, −5}, {1, −3, 3, −1, 5, 3}, {1, −1, 5, 1, −1, 5}, {1, −1, 5, −7,7, −3}, and {1, −1, 5, −7, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {1, 3, 3, −3, 5,−5}, {1, 3, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1,3, 5, 7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5,−1, −7, −3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5,−3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3},{1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1,−7, 5, −3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5,−3}, {1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1,5, 3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5,1, −5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {1, 3, 3, −3, 5,−5}, {1, 3, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1,3, 5, 7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5,−1, −7, −3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5,−3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3},{1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1,−7, 5, −3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5,−3}, {1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1,5, 3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5,1, −5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7}; or

{1, 1, −7, 5, −1, 1}, {1, 1, −7, 7, −3, 1}, {1, 1, −7, −5, 5, 1}, {1, 1,−7, −3, 3, 1}, {1, 1, −7, −3, −5, 1}, {1, 1, −7, −1, −3, 1}, {1, 3, 7,1, 5, 1}, {1, 3, −5, 3, 5, 1}, {1, 3, −5, 3, 5, −3}, {1, 3, −5, 7, −7,1}, {1, 3, −5, 7, −5, 5}, {1, 3, −5, 7, −1, 1}, {1, 3, −5, −5, 3, −1},{1, 3, −5, −3, 5, 1}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 1, 1}, {1,3, −1, 7, −7, 1}, {1, 5, 1, −7, −5, −1}, {1, 5, 3, −7, 1, 1}, {1, 5, 7,−1, −5, −1}, {1, 5, −5, −7, 1, 1}, {1, 5, −3, −5, 3, 1}, {1, 5, −1, 3,5, −3}, {1, 5, −1, 3, −3, −1}, {1, 5, −1, 3, −1, 7}, {1, 7, 5, −7, 1,1}, {1, 7, 5, −3, −3, 5}, {1, 7, −5, 3, 3, −5}, {1, −7, 1, 3, −5, 7},{1, −7, 1, 3, −1, 7}, {1, −7, 5, 7, −1, 7}, {1, −7, 5, −7, 3, 7}, {1,−7, 5, −3, −1, 7}, {1, −7, 5, −1, 1, −7}, {1, −7, 7, −3, 1, −7}, {1, −7,7, −1, 3, −5}, {1, −7, 7, −1, −3, 5}, {1, −7, −7, 1, 3, −3}, {1, −7, −7,1, 5, −5}, {1, −7, −7, 1, 7, 5}, {1, −7, −7, 1, −3, 7}, {1, −7, −7, 1,−1, 5}, {1, −7, −5, 3, 5, −3}, {1, −7, −5, 3, −5, −3}, {1, −7, −5, 3,−1, 1}, {1, −7, −5, 3, −1, 7}, {1, −7, −5, 5, 1, −7}, {1, −7, −5, 7, −1,1}, {1, −7, −5, −1, −7, −3}, {1, −7, −3, 3, 1, −7}, {1, −7, −3, 5, 3,−5}, {1, −7, −3, −5, 1, −7}, {1, −7, −1, −3, 1, −7}, {1, −5, 7, −1, −1,7}, {1, −5, −3, 5, 5, −3}, {1, −5, −3, 7, −5, 5}, {1, −5, −1, −7, −5,5}, {1, −5, −1, −7, −3, 7}, {1, −5, −1, −5, 3, 5}, {1, −3, 1, −5, −1,1}, {1, −3, 5, 5, −3, −1}, {1, −3, 5, 7, −1, 1}, {1, −3, 5, 7, −1, 7},{1, −3, 7, −7, 1, 1}, {1, −3, −1, 7, −1, 1}, {1, −1, 3, −5, −5, 3}, {1,−1, 5, −7, 1, 1}, {1, −1, 5, −3, −3, 5}, {1, −1, 7, 5, −3, 1}, {1, −1,7, 7, −1, 3}, {1, −1, 7, −5, 3, 1};

generating a first signal based on the sequence {x_(n)}; and

sending the first signal.

With reference to the seventh aspect, in a first implementation of theseventh aspect, the set of the sequence {s_(n)} includes at least one ofsequences in a second sequence set, and the second sequence set includessome sequences in the first sequence set.

With reference to the seventh aspect, in a second implementation of theseventh aspect, the generating a first signal based on the sequence{x_(n)} includes:

performing discrete Fourier transform on N elements in the sequence{x_(n)} to obtain a sequence {f_(n)} including the N elements;

mapping the N elements in the sequence {f_(n)} to N subcarriersrespectively, to obtain a frequency-domain signal including the Nelements; and

generating the first signal based on the frequency-domain signal.

With reference to the seventh aspect, in a third implementation of theseventh aspect, the N subcarriers are N consecutive subcarriers or Nequi-spaced subcarriers.

With reference to the seventh aspect, in a fourth implementation of theseventh aspect, before the performing discrete Fourier transform on Nelements in the sequence {x₇}, the first signal processing methodfurther includes: filtering the sequence {x_(n)}; or

after the performing discrete Fourier transform on N elements in thesequence {x_(n)}, the first signal processing method further includes:filtering the sequence {x_(n)}.

With reference to the seventh aspect, in a fifth implementation of theseventh aspect, the first signal is a reference signal of a secondsignal, and a modulation scheme of the second signal is π/2 binary phaseshift keying BPSK.

According to an eighth aspect, a sequence-based signal processingapparatus is provided. The apparatus includes:

a determining unit, configured to determine a sequence {x_(n)}, wherex_(n) is an element in the sequence {x_(n)} the sequence {x_(n)} is asequence satisfying a preset condition, and the preset condition is:

the preset condition is x_(n)=y_((n+M)mod K), where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, j=√{squareroot over (−1)}, and a set of a sequence {s_(n)} including an elements_(n) includes at least one of sequences in a first sequence set, where

the sequences in the first sequence set include:

{1, 1, 3, −7, 5, −3}, {1, 1, 5, −7, 3, 5}, {1, 1, 5, −5, −3, 7}, {1, 1,−7, −5, 5, −7}, {1, 1, −7, −3, 7, −7}, {1, 3, 1, 7, −1, −5}, {1, 3, 1,−7, −3, 7}, {1, 3, 1, −7, −1, −5}, {1, 3, 3, 7, −1, −5}, {1, 5, 1, 1,−5, −3}, {1, 5, 1, 3, −5, 5}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 3, −3, 1},{1, 5, 1, 3, −1, −7}, {1, 5, 1, 5, 3, −7}, {1, 5, 1, 5, 3, −5}, {1, 5,1, 5, 7, 7}, {1, 5, 1, 5, −5, 3}, {1, 5, 1, 5, −3, 3}, {1, 5, 1, 5, −1,3}, {1, 5, 1, 5, −1, −1}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, −5, 5}, {1,5, 1, −5, 3, 5}, {1, 5, 1, −5, −7, −1}, {1, 5, 1, −5, −5, −3}, {1, 5, 1,−5, −3, 1}, {1, 5, 1, −5, −1, 1}, {1, 5, 1, −5, −1, 5}, {1, 5, 1, −5,−1, −1}, {1, 5, 1, −3, 1, 7}, {1, 5, 1, −3, 1, −5}, {1, 5, 1, −3, 7,−7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1, 5, 1, −1, 3, −5},{1, 5, 1, −1, 5, −7}, {1, 5, 1, −1, −7, −3}, {1, 5, 1, −1, −5, −3}, {1,5, 3, −3, −7, −5}, {1, 5, 3, −3, −7, −1}, {1, 5, 3, −3, −1, −7}, {1, 5,3, −1, 5, −7}, {1, 5, 3, −1, −5, −3}, {1, 5, 5, 1, 3, −3}, {1, 5, 5, −1,−7, −5}, {1, 7, 1, 1, 1, −5}, {1, 7, 1, 1, −7, −7}, {1, 7, 1, 1, −5,−5}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, −7, 1, 1}, {1,7, 1, −7, −7, −7}, {1, 7, 1, −5, 1, 1}, {1, 7, 1, −5, −5, 1}, {1, 7, 1,−5, −3, 1}, {1, 7, 1, −5, −1, 1}, {1, 7, 1, −5, −1, −1}, {1, 7, 1, −1,5, 7}, {1, 7, 3, 1, 5, −3}, {1, 7, 3, 1, −5, −5}, {1, 7, 3, 5, −5, −7},{1, 7, 3, −7, 7, −1}, {1, 7, 3, −7, −5, 3}, {1, 7, 3, −5, −7, −1}, {1,7, 3, −3, −5, 1}, {1, 7, 3, −3, −5, −1}, {1, 7, 3, −3, −3, −3}, {1, 7,3, −1, −5, −3}, {1, 7, 5, 1, −5, −5}, {1, 7, 5, 1, −5, −3}, {1, 7, 5,−5, 3, −1}, {1, 7, 5, −5, −3, −7}, {1, 7, 5, −3, −7, 1}, {1, 7, 5, −1,−5, −5}, {1, 7, 5, −1, −5, −3}, {1, −7, 1, −5, 1, 1}, {1, −7, 3, 3, −5,−5}, {1, −7, 3, 5, −1, −3}, {1, −7, 3, −5, 1, 1}, {1, −7, 3, −5, −5, 1},{1, −7, 3, −5, −5, −5}, {1, −7, 5, −3, −5, 1}, {1, −5, 1, 1, 3, 7}, {1,−5, 1, 1, 5, 7}, {1, −5, 1, 1, 7, 7}, {1, −5, 1, 3, 3, 7}, {1, −5, 1, 7,5, −1}, {1, −5, 1, 7, 7, 1}, {1, −5, 1, −7, −7, 1}, {1, −5, 1, −7, −7,−7}, {1, −5, 3, −7, −7, 1}, {1, −5, 5, 3, −5, −3}, {1, −5, 5, 3, −5,−1}, {1, −5, 5, 5, −5, −3}, {1, −5, 5, 5, −5, −1}, {1, −5, 5, 7, −5, 1},{1, −5, 5, 7, −5, 3}, {1, −5, 5, −7, −5, 1}, {1, −5, 5, −7, −5, 3}, {1,−5, 7, 3, 5, −3}, {1, −5, −7, 3, 5, −3}, {1, −5, −7, 3, 5, −1}, {1, −5,−7, 3, 7, −1}, {1, −3, 1, 1, 3, 7}, {1, −3, 1, 1, 5, 7}, {1, −3, 1, 1,5, −1}, {1, −3, 1, 3, 3, 7}, {1, −3, 1, 3, −7, 7}, {1, −3, 1, 5, 7, 1},{1, −3, 1, 5, 7, 3}, {1, −3, 1, 5, 7, 7}, {1, −3, 1, 5, −7, 3}, {1, −3,1, 7, −5, 5}, {1, −3, 1, 7, −1, 3}, {1, −3, 1, −7, 3, −1}, {1, −3, 1,−7, 7, −1}, {1, −3, 1, −7, −5, 5}, {1, −3, 1, −7, −3, 3}, {1, −3, 1, −5,7, −1}, {1, −3, 3, 3, −7, 7}, {1, −3, 3, 5, −5, −7}, {1, −3, 3, 7, 7,7}, {1, −3, 3, 7, −7, 5}, {1, −3, 3, −7, −7, 3}, {1, −3, 3, −5, −7, −1},{1, −3, 7, −5, 3, 5}, {1, −1, 1, 7, 3, −7}, {1, −1, 1, 7, 3, −5}, {1,−1, 1, −5, 5, −7}, {1, −1, 3, −7, −5, 7}, {1, −1, 5, −7, −5, 5}, {1, −1,5, −7, −5, 7}, {1, −1, 5, −5, −5, 5}, and {1, −1, 5, −5, −5, 7};

{1, 1, 5, −7, 3, 7}, {1, 1, 5, −7, 3, −3}, {1, 1, 5, −1, 3, 7}, {1, 1,5, −1, −7, −3}, {1, 3, 1, 7, −1, −7}, {1, 3, 1, −7, 1, −5}, {1, 3, 1,−7, 3, −5}, {1, 3, 1, −7, −1, −7}, {1, 3, 1, −5, 1, −7}, {1, 3, 1, −5,3, −7}, {1, 3, 5, −7, 3, 7}, {1, 3, 5, −1, 3, 7}, {1, 3, 5, −1, 3, −3},{1, 3, 5, −1, −5, 7}, {1, 3, 7, 1, 5, 7}, {1, 3, 7, −7, 3, 7}, {1, 3, 7,−5, 5, 7}, {1, 5, 1, 1, 5, −7}, {1, 5, 1, 1, 5, −3}, {1, 5, 1, 5, 5,−7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1,5, 1, 5, −3, 1}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 5, −1, 3}, {1, 5, 1, 7,−3, −5}, {1, 5, 1, −7, 1, −3}, {1, 5, 1, −7, −3, 5}, {1, 5, 1, −5, 5,7}, {1, 5, 1, −5, −3, 7}, {1, 5, 1, −3, 1, −7}, {1, 5, 1, −3, 5, −7},{1, 5, 1, −3, 7, −7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1,5, 3, 1, 5, −7}, {1, 5, 3, 1, 5, −3}, {1, 5, 3, 7, −3, −5}, {1, 5, 3, 7,−1, 3}, {1, 5, 3, −7, −3, 7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −1, −5,−3}, {1, 5, 5, −1, 3, 7}, {1, 5, 5, −1, 3, −3}, {1, 5, 7, 1, 3, −3}, {1,5, −7, −3, 7, 7}, {1, 7, 1, 1, 3, −5}, {1, 7, 1, 1, −7, −5}, {1, 7, 1,1, −1, −7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −5,−5}, {1, 7, 1, 3, −1, −5}, {1, 7, 1, 5, −1, −3}, {1, 7, 1, 7, −7, −7},{1, 7, 1, 7, −1, −1}, {1, 7, 1, −7, 1, −1}, {1, 7, 1, −7, −5, −5}, {1,7, 1, −7, −1, 1}, {1, 7, 1, −7, −1, −1}, {1, 7, 1, −5, −7, 1}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −5, −5, 3}, {1, 7, 1, −5, −1, 3}, {1, 7, 1, −5,−1, −3}, {1, 7, 1, −3, −7, −5}, {1, 7, 1, −3, −7, −1}, {1, 7, 1, −3, −1,5}, {1, 7, 1, −1, 1, −7}, {1, 7, 1, −1, 7, −7}, {1, 7, 1, −1, −7, −3},{1, 7, 3, 1, 7, −5}, {1, 7, 3, 1, 7, −3}, {1, 7, 3, 5, −1, −5}, {1, 7,3, −7, 7, −3}, {1, 7, 3, −7, −3, 3}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, −7, −5}, {1, 7, 3, −3, −7, −1}, {1, 7, 3, −3, −1, −5}, {1, 7, 3, −1,−7, −5}, {1, 7, 5, −1, 3, −3}, {1, 7, 5, −1, −7, −7}, {1, 7, 5, −1, −7,−3}, {1, −7, 1, 3, −3, 3}, {1, −7, 1, −7, 1, 1}, {1, −7, 3, 1, 7, −1},{1, −7, 3, 1, −7, −5}, {1, −7, 3, 1, −7, −1}, {1, −7, 3, 3, −3, −5}, {1,−7, 3, 5, −3, −5}, {1, −7, 3, −5, −7, −1}, {1, −7, 3, −5, −3, 3}, {1,−7, 3, −3, −3, 3}, {1, −7, 5, 1, −7, −3}, {1, −5, 1, 1, 3, −7}, {1, −5,1, 1, −7, 7}, {1, −5, 1, 3, 3, −7}, {1, −5, 1, 3, −7, 5}, {1, −5, 1, 5,3, 7}, {1, −5, 1, 5, 3, −3}, {1, −5, 1, 5, −7, 3}, {1, −5, 1, 5, −7, 7},{1, −5, 1, 7, 3, −1}, {1, −5, 1, 7, 5, −1}, {1, −5, 1, 7, 7, −7}, {1,−5, 1, 7, 7, −1}, {1, −5, 1, 7, −7, 1}, {1, −5, 1, 7, −7, 5}, {1, −5, 1,7, −1, 1}, {1, −5, 1, −7, 3, 1}, {1, −5, 1, −7, 7, −7}, {1, −5, 1, −7,7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −7, −5, 3}, {1, −5, 1, −3, 3,5}, {1, −5, 1, −1, 3, 7}, {1, −5, 1, −1, 7, 7}, {1, −5, 3, 1, 7, 7}, {1,−5, 3, 5, −5, 3}, {1, −5, 3, 5, −3, 3}, {1, −5, 3, −7, 7, 1}, {1, −5, 3,−7, 7, −1}, {1, −5, 3, −7, −5, 3}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1,−5, −3}, {1, −5, 5, 3, −7, 1}, {1, −5, 5, 3, −7, −3}, {1, −5, 5, 7, 3,−3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −1, 3, 5}, {1, −5, 7, 1, 3, −3},{1, −5, 7, 1, 3, −1}, {1, −5, 7, 1, 5, −1}, {1, −5, −7, 3, 3, −3}, {1,−5, −7, 3, 7, 1}, {1, −5, −7, 3, 7, −3}, {1, −3, 1, 5, −3, 1}, {1, −3,1, 7, 5, −5}, {1, −3, 1, 7, −5, 5}, {1, −3, 1, −7, −5, 5}, {1, −3, 1,−7, −3, 1}, {1, −3, 1, −7, −3, 5}, {1, −3, 1, −5, −3, 7}, {1, −3, 3, 7,−3, 3}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −5, 7}, {1, −3, 3, −7, −3,3}, {1, −1, 1, 7, −1, −7}, {1, −1, 1, −7, 3, −5}, {1, −1, 1, −7, −1, 7},{1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, −5}, and {1, −1, 5, −7, 3, 7};

{1, 1, 5, −5, 3, −3}, {1, 1, 7, −5, 7, −1}, {1, 1, 7, −1, 3, −1}, {1, 1,−5, 3, −1, 3}, {1, 1, −5, 7, −5, 3}, {1, 1, −3, 7, −1, 5}, {1, 3, 7, −5,3, −3}, {1, 3, −1, −7, 1, 5}, {1, 5, 1, −7, 3, 3}, {1, 5, 1, −5, −5, 1},{1, 5, 3, −1, −5, 3}, {1, 5, 5, 1, −5, 3}, {1, 5, 7, 3, −3, 5}, {1, 5,−7, 1, −5, 7}, {1, 5, −7, −5, 7, 1}, {1, 5, −5, 3, −3, −7}, {1, 5, −5,3, −1, −5}, {1, 5, −5, −5, 5, −3}, {1, 5, −3, 3, 3, −3}, {1, 5, −3, 7,3, 5}, {1, 7, 7, 1, −7, 5}, {1, 7, 7, 1, −3, 1}, {1, 7, −5, 7, −1, −7},{1, 7, −5, −7, 5, 1}, {1, 7, −5, −5, 7, 1}, {1, 7, −1, 3, −1, −7}, {1,7, −1, −7, 5, 5}, {1, 7, −1, −5, 7, 5}, {1, −7, 3, 3, −7, −3}, {1, −7,3, −1, 1, 5}, {1, −7, 5, 1, −1, 3}, {1, −7, 5, −7, −1, −1}, {1, −7, −3,1, 3, −1}, {1, −7, −3, −7, 3, 3}, {1, −7, −1, 3, 3, −1}, {1, −7, −1, −1,−7, 5}, {1, −5, 3, 7, −5, −3}, {1, −5, 3, −1, 3, −7}, {1, −5, 7, 7, −5,1}, {1, −5, 7, −7, −3, 1}, {1, −5, 7, −5, 3, −7}, {1, −5, −5, 1, 5, 1},{1, −5, −5, 1, −7, −3}, {1, −3, 1, 7, 7, 1}, {1, −3, 1, −7, −1, −1}, {1,−3, 5, −5, −1, −3}, {1, −3, 5, −1, −1, 5}, {1, −3, 7, 7, −3, 5}, {1, −3,7, −1, 3, 7}, {1, −3, 7, −1, 5, −7}, {1, −3, −7, 1, 7, −5}, {1, −3, −7,7, −5, 1}, {1, −3, −3, 1, 7, −1}, {1, −3, −1, 3, 7, −1}, {1, −1, 3, −7,1, −3}, and {1, −1, −5, 7, −1, 5};

{1, 3, 7, −5, 1, −3}, {1, 3, −7, 5, 1, 5}, {1, 3, −7, −3, 1, −3}, {1, 3,−1, −5, 1, 5}, {1, 5, 1, −3, 3, 5}, {1, 5, 1, −3, 7, 5}, {1, 5, 1, −3,−5, 5}, {1, 5, 1, −3, −1, 5}, {1, 5, 3, −3, −7, 5}, {1, 5, 7, 3, −1, 5},{1, 5, 7, −3, −7, 5}, {1, 5, −7, 3, 1, −3}, {1, 5, −7, 5, 1, 7}, {1, 5,−7, 7, 3, −1}, {1, 5, −7, −5, 1, −3}, {1, 5, −7, −1, 1, −3}, {1, 5, −5,7, 3, 5}, {1, 5, −5, −3, −7, 5}, {1, 5, −1, −5, 7, 5}, {1, 5, −1, −3,−7, 5}, {1, 7, 3, −1, 3, 7}, {1, 7, −7, 5, 1, 5}, {1, 7, −7, −3, 1, −3},{1, 7, −5, −1, 1, −3}, {1, −5, 7, 3, 1, 5}, {1, −5, −7, 5, 1, 5}, {1,−3, 1, 5, 7, −3}, {1, −3, 1, 5, −5, −3}, {1, −3, 3, 5, −7, −3}, {1, −3,−7, 3, 1, 5}, {1, −3, −7, 7, 1, 5}, {1, −3, −7, −5, 1, 5}, {1, −3, −7,−3, 1, −1}, {1, −3, −7, −1, 1, 5}, {1, −3, −5, 5, −7, −3}, {1, −3, −1,3, 7, −3}, {1, −3, −1, 5, −7, −3}, {1, −1, 3, 7, 3, −1}, {1, −1, −7, 5,1, 5}, and {1, −1, −5, 7, 1, 5};

{1, 3, −3, 1, 3, −3}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 3, 7}, {1,3, −3, −7, −5, 5}, {1, 3, −3, −1, 3, −3}, {1, 5, −1, −7, 3, 7}, {1, 7,3, 1, 5, −1}, {1, 7, 3, 1, 7, 5}, {1, 7, 3, 1, −5, −1}, {1, 7, 3, 1, −3,3}, {1, 7, 3, 5, −7, 3}, {1, 7, 3, 5, −1, 3}, {1, 7, 3, 7, 1, 3}, {1, 7,3, −7, 3, 7}, {1, 7, 3, −7, 5, −5}, {1, 7, 3, −7, 7, −3}, {1, 7, 3, −7,−3, 7}, {1, 7, 3, −7, −1, −3}, {1, 7, 3, −3, 1, −5}, {1, 7, 3, −3, 7,−5}, {1, 7, 3, −1, −7, −5}, {1, 7, 5, 1, 7, 5}, {1, 7, 5, −7, −1, −3},{1, 7, 5, −1, −7, −3}, {1, −5, −3, 1, −5, −3}, {1, −5, −3, 7, −5, 5},{1, −5, −3, −7, 3, 5}, {1, −5, −3, −7, 3, 7}, {1, −5, −3, −1, 3, −3},{1, −3, 3, 1, 3, −3}, {1, −3, 3, 1, 5, −1}, {1, −3, 3, 1, −5, −1}, {1,−3, 3, 5, −7, 3}, {1, −3, 3, 5, −1, 3}, {1, −3, 3, 7, −3, −5}, {1, −3,3, −7, 3, 7}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −3, 7}, {1, −3, 3,−3, 7, −5}, {1, −3, 3, −1, 5, 3}, {1, −1, 5, 1, −1, 5}, {1, −1, 5, −7,7, −3}, and {1, −1, 5, −7, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {1, 3, 3, −3, 5,−5}, {1, 3, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1,3, 5, 7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5,−1, −7, −3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5,−3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3},{1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1,−7, 5, −3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5,−3}, {1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1,5, 3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5,1, −5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {1, 3, 3, −3, 5,−5}, {1, 3, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1,3, 5, 7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5,−1, −7, −3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5,−3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3},{1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1,−7, 5, −3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5,−3}, {1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1,5, 3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5,1, −5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7}; or

{1, 1, −7, 5, −1, 1}, {1, 1, −7, 7, −3, 1}, {1, 1, −7, −5, 5, 1}, {1, 1,−7, −3, 3, 1}, {1, 1, −7, −3, −5, 1}, {1, 1, −7, −1, −3, 1}, {1, 3, 7,1, 5, 1}, {1, 3, −5, 3, 5, 1}, {1, 3, −5, 3, 5, −3}, {1, 3, −5, 7, −7,1}, {1, 3, −5, 7, −5, 5}, {1, 3, −5, 7, −1, 1}, {1, 3, −5, −5, 3, −1},{1, 3, −5, −3, 5, 1}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 1, 1}, {1,3, −1, 7, −7, 1}, {1, 5, 1, −7, −5, −1}, {1, 5, 3, −7, 1, 1}, {1, 5, 7,−1, −5, −1}, {1, 5, −5, −7, 1, 1}, {1, 5, −3, −5, 3, 1}, {1, 5, −1, 3,5, −3}, {1, 5, −1, 3, −3, −1}, {1, 5, −1, 3, −1, 7}, {1, 7, 5, −7, 1,1}, {1, 7, 5, −3, −3, 5}, {1, 7, −5, 3, 3, −5}, {1, −7, 1, 3, −5, 7},{1, −7, 1, 3, −1, 7}, {1, −7, 5, 7, −1, 7}, {1, −7, 5, −7, 3, 7}, {1,−7, 5, −3, −1, 7}, {1, −7, 5, −1, 1, −7}, {1, −7, 7, −3, 1, −7}, {1, −7,7, −1, 3, −5}, {1, −7, 7, −1, −3, 5}, {1, −7, −7, 1, 3, −3}, {1, −7, −7,1, 5, −5}, {1, −7, −7, 1, 7, 5}, {1, −7, −7, 1, −3, 7}, {1, −7, −7, 1,−1, 5}, {1, −7, −5, 3, 5, −3}, {1, −7, −5, 3, −5, −3}, {1, −7, −5, 3,−1, 1}, {1, −7, −5, 3, −1, 7}, {1, −7, −5, 5, 1, −7}, {1, −7, −5, 7, −1,1}, {1, −7, −5, −1, −7, −3}, {1, −7, −3, 3, 1, −7}, {1, −7, −3, 5, 3,−5}, {1, −7, −3, −5, 1, −7}, {1, −7, −1, −3, 1, −7}, {1, −5, 7, −1, −1,7}, {1, −5, −3, 5, 5, −3}, {1, −5, −3, 7, −5, 5}, {1, −5, −1, −7, −5,5}, {1, −5, −1, −7, −3, 7}, {1, −5, −1, −5, 3, 5}, {1, −3, 1, −5, −1,1}, {1, −3, 5, 5, −3, −1}, {1, −3, 5, 7, −1, 1}, {1, −3, 5, 7, −1, 7},{1, −3, 7, −7, 1, 1}, {1, −3, −1, 7, −1, 1}, {1, −1, 3, −5, −5, 3}, {1,−1, 5, −7, 1, 1}, {1, −1, 5, −3, −3, 5}, {1, −1, 7, 5, −3, 1}, {1, −1,7, 7, −1, 3}, and {1, −1, 7, −5, 3, 1};

a generation unit, configured to generate a first signal based on thesequence {x_(n)}; and

a sending unit, configured to send the first signal.

With reference to the eighth aspect, in a first implementation of theeighth aspect, the set of the sequence {s_(n)} includes at least one ofsequences in a second sequence set, and the second sequence set includessome sequences in the first sequence set.

With reference to the eighth aspect, in a second implementation of theeighth aspect,

the generation unit is further configured to perform discrete Fouriertransform on N elements in the sequence {x_(n)} to obtain a sequence{f_(n)} including the N elements;

the generation unit is further configured to map the N elements in thesequence {f_(n)} to N subcarriers respectively, to obtain afrequency-domain signal including the N elements; and

the generation unit is further configured to generate the first signalbased on the frequency-domain signal.

With reference to the eighth aspect, in a third implementation of theeighth aspect, the N subcarriers are N consecutive subcarriers or Nequi-spaced subcarriers.

With reference to the eighth aspect, in a fourth implementation of theeighth aspect, the signal processing apparatus further includes a filterunit, configured to: filter the sequence {x_(n)} before the discreteFourier transform is performed on the N elements in the sequence{x_(n)}; or

filter the sequence {x_(n)} after the discrete Fourier transform isperformed on the N elements in the sequence {x_(n)}.

With reference to the eighth aspect, in a fifth implementation of theeighth aspect, the first signal is a reference signal of a secondsignal, and a modulation scheme of the second signal is π/2 binary phaseshift keying BPSK.

According to a ninth aspect, a communications apparatus is provided. Theapparatus may be a terminal, or may be a chip in a terminal. Theapparatus has a function of implementing any one of the first aspect,the third aspect to the sixth aspect, the seventh aspect, and thepossible implementations. This function may be implemented by hardware,or may be implemented by hardware executing corresponding software. Thehardware or software includes one or more modules corresponding to thefunction.

In a possible design, the apparatus includes a processing module and atransceiver module. The transceiver module may be, for example, at leastone of a transceiver, a receiver, or a transmitter. The transceivermodule may include a radio frequency circuit or an antenna. Theprocessing module may be a processor.

Optionally, the apparatus further includes a storage module, and thestorage module may be, for example, a memory. When the storage module isincluded, the storage module is configured to store an instruction. Theprocessing module is connected to the storage module, and the processingmodule may execute the instruction stored in the storage module or aninstruction from another module, to enable the apparatus to perform themethod according to any one of the first aspect, the third aspect, thesixth aspect, and the possible implementations.

In another possible design, when the apparatus is a chip, the chipincludes a processing module. Optionally, the chip further includes atransceiver module. The transceiver module may be, for example, aninput/output interface, a pin, or a circuit on the chip. The processingmodule may be, for example, a processor. The processing module mayexecute an instruction, to enable the chip in the terminal to performthe method according to any one of the first aspect, the third aspect tothe sixth aspect, the seventh aspect, and the possible implementations.

Optionally, the processing module may execute an instruction in astorage module, and the storage module may be a storage module in thechip, for example, a register or a cache. The storage module mayalternatively be located inside a communications device but outside thechip, for example, a read-only memory (ROM), another type of staticstorage device that can store static information and instructions, or arandom access memory (RAM).

The processor mentioned above may be a general-purpose centralprocessing unit (CPU), a microprocessor, an application-specificintegrated circuit (ASIC), or one or more integrated circuits configuredto control program execution of the communication methods in theforegoing aspects.

According to a tenth aspect, a communications apparatus is provided. Theapparatus may be a network device, or may be a chip in a network device.The apparatus has a function of implementing any one of the secondaspect, the eighth aspect, and the possible implementations. Thisfunction may be implemented by hardware, or may be implemented byhardware executing corresponding software. The hardware or softwareincludes one or more modules corresponding to the function.

In a possible design, the apparatus includes a processing module and atransceiver module. The transceiver module may be, for example, at leastone of a transceiver, a receiver, or a transmitter. The transceivermodule may include a radio frequency circuit or an antenna. Theprocessing module may be a processor.

Optionally, the apparatus further includes a storage module, and thestorage module may be, for example, a memory. When the storage module isincluded, the storage module is configured to store an instruction. Theprocessing module is connected to the storage module, and the processingmodule may execute the instruction stored in the storage module or aninstruction from another module to enable the apparatus to perform themethod according to any one of the second aspect, the eighth aspect, andthe possible implementations. In this design, the apparatus may be anetwork device.

In another possible design, when the apparatus is a chip, the chipincludes a transceiver module and a processing module. The transceivermodule may be, for example, an input/output interface, a pin, or acircuit on the chip. The processing module may be, for example, aprocessor. The processing module may execute an instruction to enablethe chip in the network device to perform the method according to anyone of the second aspect, the eighth aspect, and the possibleimplementations.

Optionally, the processing module may execute an instruction in astorage module, and the storage module may be a storage module in thechip, for example, a register or a cache. The storage module mayalternatively be located inside a communications device but outside thechip, for example, a read-only memory, another type of static storagedevice that can store static information and instructions, or a randomaccess memory.

The processor mentioned above may be a general-purpose centralprocessing unit, a microprocessor, an application-specific integratedcircuit, or one or more integrated circuits configured to controlprogram execution of the communication methods in the foregoing aspects.

According to an eleventh aspect, a computer storage medium is provided.The computer storage medium stores program code. The program code isused to indicate an instruction for performing the method according toany one of the first aspect, the third aspect to the sixth aspect, theseventh aspect, and the possible implementations.

According to a twelfth aspect, a computer storage medium is provided.The computer storage medium stores program code. The program code isused to indicate an instruction for performing the method according toany one of the second aspect and the seventh aspect and the possibleimplementations.

According to a thirteenth aspect, a computer program product includingan instruction is provided. When the computer program product runs on acomputer, the computer is enabled to perform the method according to anyone of the first aspect, the third aspect to the sixth aspect, theseventh aspect, and the possible implementations.

According to a fourteenth aspect, a computer program product includingan instruction is provided. When the computer program product runs on acomputer, the computer is enabled to perform the method according to anyone of the second aspect or the possible implementations thereof.

According to a fifteenth aspect, a processor is provided. The processoris configured to couple to a memory and configured to perform the methodaccording to any one of the first aspect, the third aspect to the sixthaspect, the seventh aspect, and the possible implementations.

According to a sixteenth aspect, a processor is provided. The processoris configured to couple to a memory, and configured to perform themethod according to any one of the second aspect, the eighth aspect, andthe possible implementations.

According to a seventeenth aspect, a chip is provided. The chip includesa processor and a communications interface. The communications interfaceis configured to communicate with an external component or an internalcomponent. The processor is configured to implement the method accordingto any one of the first aspect, the third aspect to the sixth aspect,the seventh aspect, and the possible implementations.

Optionally, the chip may further include a memory. The memory stores aninstruction. The processor is configured to execute the instructionstored in the memory or an instruction from another module. When theinstruction is executed, the processor is configured to implement themethod according to any one of the first aspect, the third aspect to thesixth aspect, and the possible implementations.

Optionally, the chip may be integrated on a terminal.

According to an eighteenth aspect, a chip is provided. The chip includesa processor and a communications interface. The communications interfaceis configured to communicate with an external component or an internalcomponent. The processor is configured to implement the method accordingto any one of the second aspect, the eighth aspect, and the possibleimplementations.

Optionally, the chip may further include a memory. The memory stores aninstruction. The processor is configured to execute the instructionstored in the memory or an instruction from another module. When theinstruction is executed, the processor is configured to implement themethod according to any one of the second aspect, the eighth aspect, andthe possible implementations.

Optionally, the chip may be integrated on a network device.

Based on the foregoing technical solution, in frequency-domain resourcesof a comb structure, reference signals mapped to frequency-domainresources on different combs may be generated by using differentsequences. In other words, the reference signals on differentfrequency-domain resources may be generated by using the differentsequences. This improves performance of the reference signalstransmitted on the frequency-domain resources of the comb structure.According to some embodiments of the present disclosure,auto-correlations and PAPRs of the reference signals transmitted on thefrequency-domain resource of the comb structure are reduced, and across-correlation between reference signals that use different sequencesand occupy a same frequency-domain resource is also reduced. Thisimproves transmission performance of the reference signals.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of a communications system according tothis application;

FIG. 2 is a schematic flowchart of a signal transmission methodaccording to a conventional solution;

FIG. 3 is a schematic flowchart of a signal processing method accordingto a conventional solution;

FIG. 4 is a schematic flowchart of a signal processing method accordingto an embodiment of this application;

FIG. 5 is a schematic flowchart of a signal processing method accordingto another embodiment of this application;

FIG. 6 is a schematic flowchart of a signal processing method accordingto another embodiment of this application;

FIG. 7 is a schematic flowchart of a signal processing method accordingto another embodiment of this application;

FIG. 8 is a schematic flowchart of a signal processing method accordingto another embodiment of this application;

FIG. 9 is a schematic flowchart of a signal processing method accordingto another embodiment of this application;

FIG. 10 is a schematic block diagram of a signal processing apparatusaccording to an embodiment of this application;

FIG. 11 is a schematic block diagram of a signal processing apparatusaccording to another embodiment of this application;

FIG. 12 is a schematic block diagram of a signal processing apparatusaccording to another embodiment of this application;

FIG. 13 is a schematic block diagram of a signal processing apparatusaccording to another embodiment of this application;

FIG. 14 is a schematic block diagram of a signal processing apparatusaccording to a specific embodiment of this application;

FIG. 15 is a schematic block diagram of a signal processing apparatusaccording to another specific embodiment of this application;

FIG. 16 is a schematic block diagram of a signal processing apparatusaccording to another specific embodiment of this application;

FIG. 17 is a schematic block diagram of a signal processing apparatusaccording to another specific embodiment of this application; and

FIG. 18 is a schematic diagram of a signal processing method accordingto another embodiment of this application.

DESCRIPTION OF EMBODIMENTS

The following describes technical solutions of this application withreference to the accompanying drawings.

The technical solutions of embodiments of this application may beapplied to various communications systems, such as a global system formobile communications (GSM), a code division multiple access (CDMA)system, a wideband code division multiple access (WCDMA) system, ageneral packet radio service (GPRS) system, a long term evolution (LTE)system, an LTE frequency division duplex (FDD) system, an LTE timedivision duplex (TDD) system, a universal mobile telecommunicationssystem (UMTS), a worldwide interoperability for microwave access (WiMAX)communications system, and a future 5th generation (5G) system or newradio (NR) system.

A terminal device in some embodiments of this application may be userequipment, an access terminal, a subscriber unit, a subscriber station,a mobile station, a remote station, a remote terminal, a mobile device,a user terminal, a terminal, a wireless communications device, a useragent, or a user apparatus. The terminal device may alternatively be acellular phone, a cordless phone, a session initiation protocol (SIP)phone, a wireless local loop (WLL) station, a personal digital assistant(PDA), a handheld device having a wireless communication function, acomputing device, another processing device connected to a wirelessmodem, a vehicle-mounted device, a wearable device, a terminal device ina future 5G network, or a terminal device in a future evolved publicland mobile network (PLMN). This is not limited in the embodiments ofthis application.

A network device in the embodiments this application may be a deviceconfigured to communicate with a terminal device. The network device maybe a base transceiver station (BTS) in a global system for mobilecommunications (GSM) or a code division multiple access (CDMA) system,or may be a NodeB (NB) in a wideband code division multiple access(WCDMA) system, or may be an evolved NodeB (eNB or eNodeB) in an LTEsystem, or may be a radio controller in a cloud radio access network(CRAN) scenario, or the like. Alternatively, the network device may be arelay station, an access point, a vehicle-mounted device, a wearabledevice, a network device in a future 5G network, a network device in afuture evolved PLMN network, or the like. This is not limited in theembodiments of this application.

In the embodiments of this application, the terminal device or thenetwork device includes a hardware layer, an operating system layerrunning on the hardware layer, and an application layer running on theoperating system layer. The hardware layer includes hardware such as acentral processing unit (CPU), a memory management unit (MMU), and amemory (also referred to as main memory). The operating system may beany one or more types of computer operating systems, for example, aLinux operating system, a Unix operating system, an Android operatingsystem, an iOS operating system, or a Windows operating system, thatimplement service processing by using a process. The application layerincludes applications such as a browser, an address book, wordprocessing software, and instant messaging software. In addition, aspecific structure of an execution body of a method provided in theembodiments of this application is not specifically limited in theembodiments of this application, provided that a program that recordscode of the method provided in the embodiments of this application canbe run to perform communication according to the method provided in theembodiments of this application. For example, the execution body of themethod provided in the embodiments of this application may be theterminal device or the network device, or a function module that caninvoke and execute the program in the terminal device or the networkdevice.

In addition, aspects or features of this application may be implementedas a method, an apparatus, or a product that uses standard programmingand/or engineering technologies. The term “product” used in thisapplication covers a computer program that can be accessed from anycomputer-readable component, carrier, or medium. For example, thecomputer-readable medium may include, but is not limited to, a magneticstorage component (for example, a hard disk, a floppy disk, or amagnetic tape), an optical disc (for example, a compact disc (CD), or adigital versatile disc (DVD)), a smart card, and a flash memorycomponent (for example, an erasable programmable read-only memory(EPROM), a card, a stick, or a key drive). In addition, various storagemedia described in this specification may indicate one or more devicesand/or other machine-readable media that are configured to storeinformation. The term “machine-readable media” may include, but is notlimited to, a radio channel and various other media that can store,contain, and/or carry an instruction and/or data.

FIG. 1 is a schematic diagram of a communications system according tothis application. The communications system in FIG. 1 may include atleast one terminal (for example, a terminal 10, a terminal 20, aterminal 30, a terminal 40, a terminal 50, and a terminal 60) and anetwork device 70. The network device 70 is configured to: provide acommunications service for the terminal and connect the terminal to acore network. The terminal may access the network by searching for asynchronization signal, a broadcast signal, and the like sent by thenetwork device 70 to communicate with the network. The terminal 10, theterminal 20, the terminal 30, the terminal 40, and the terminal 60 inFIG. 1 may perform uplink and downlink transmission with the networkdevice 70. For example, the network device 70 may send a downlink signalto the terminal 10, the terminal 20, the terminal 30, the terminal 40,and the terminal 60, and may also receive uplink signals that are sentby the terminal 10, the terminal 20, the terminal 30, the terminal 40,and the terminal 60.

In addition, the terminal 40, the terminal 50, and the terminal 60 mayalternatively be considered as a communications system. The terminal 60may send a downlink signal to the terminal 40 and the terminal 50, andmay also receive uplink signals sent by the terminal 40 and the terminal50.

In a conventional solution, a DMRS sequence having a length of 6 is usedto support transmission of a PUSCH whose frequency-domain bandwidthincludes 12 subcarriers. The DMRS sequence having the length of 6 ismapped to six equi-spaced subcarriers, for example, mapped to bandwidthhaving a spacing of one subcarrier. The DMRS sequence having the lengthof 6 is any group of elements φ(0), . . . , φ(5) in Table 1. The DMRSsequence s(n) having the length of 6 is transformed into a sequencey(m).

In the conventional solution, to support transmission of a PUSCH whosefrequency-domain bandwidth includes 12 subcarriers (one RB), the DMRSsequence is determined based on a CGS sequence that is mapped tofrequency domain to obtain a comb-2 structure. To be specific, atime-domain base sequence is repeated twice, an OCC[+1, +1] is used forone of the repeated time-domain base sequences, an OCC [+1, −1] is usedfor the other one of the repeated time-domain base sequences, and thenDFT transform is performed. To ensure a plurality of factors such as alow PAPR characteristic, good frequency-domain flatness, a goodtime-domain auto-correlation characteristic, and a low sequencecross-correlation characteristic, a modulation scheme used by the DMRSsequence is usually a high-order modulation scheme. For example, ageneration manner of a sequence using 8PSK is s(n)=e^(jφ(n)n/8) with0≤n≤5, where φ(n) may be determined based on Table 1.

TABLE 1 μ φ(0), . . . , φ(5)φ(0), . . . , μ(5) PAPR (dB) 0 −7 5 −7 −3 −55 1.4610 1 −7 −3 −7 −3 7 5 1.4610 2 −7 −3 3 7 3 −3 1.5421 3 −7 5 −7 −3 75 1.6373 4 −7 −3 −7 −3 −5 5 1.6373 5 −7 1 −1 5 −7 5 1.6492 6 −7 5 −1 1−3 1 1.8773 7 −7 −3 −7 −5 5 1 1.8773 8 −7 −5 3 7 5 −1 1.9518 9 −7 3 −3−5 −1 7 1.9518 10 −7 1 −3 1 7 5 1.9574 11 −7 −3 −3 −1 −7 5 1.9661 12 −7−7 −3 1 −3 7 1.9661 13 −7 5 −5 −1 −3 5 1.9682 14 −7 −1 5 7 5 −1 1.991115 −7 3 −3 −5 −3 3 1.9911 16 −7 −3 3 −1 −7 −5 1.9939 17 −7 −3 −5 −3 7 31.9939 18 −7 −1 −3 −1 7 3 2.0232 19 −7 5 7 −1 −3 3 2.0314 20 −7 −1 −3 57 3 2.0314 21 −7 −1 3 7 3 −1 2.0425 22 −7 3 −1 −5 −1 3 2.0425 23 −7 3 37 −5 7 2.0490 24 −7 5 −7 −3 −3 7 2.0491 25 −7 −5 3 7 3 −3 2.0927 26 −7 3−1 3 −5 −3 2.0928 27 −7 1 −3 5 7 5 2.1111 28 −7 5 −3 1 1 −1 2.1966 29 −77 7 −5 3 −1 2.1966

The comb-2 structure used for DMRS mapping in frequency domain is shownin FIG. 2. To be specific, for a PUSCH of a user, a DMRS occupies onlyan odd-numbered subcarrier or an even-numbered subcarrier. For a system,a PUSCH of another user that is scheduled at the same time may occupythe other group of subcarriers.

Sequences in Table 1 are repeated by using [+1 +1] and [+1 −1] and aretransformed into the frequency domain for frequency-domain filtering. Asequence value on each subcarrier is finally output, as shown in Table2. The foregoing transform process is shown in FIG. 3. For example, abase sequence s_(N/2) having a length of N/2 is repeated to obtains⁽⁰⁾=[s_(N/2), s_(N/2)] and s⁽¹⁾=[s_(N/2), −s_(N/2)], and then DFTtransform is performed on s⁽⁰⁾ and s⁽¹⁾ to obtain s⁽⁰⁾=DFT(s⁽⁰⁾) ands⁽¹⁾=DFT(s⁽¹⁾), where the sequence s⁽⁰⁾ having a length of N occupiesonly even-numbered subcarriers shown in FIG. 2, and the sequence s⁽¹⁾having a length of N occupies only odd-numbered subcarriers shown inFIG. 2.

It may be learned from the following Table 2 and the foregoing Table 1that, a sequence s having a length of 6 may be searched for, where aPAPR value of a sequence obtained after the sequence s is repeated byusing [+1 +1] is lower than a PAPR value of the sequence s in Table 1,but a PAPR value of a sequence obtained after the sequence s is repeatedby using [+1 −1] is higher than the PAPR value of the sequence s inTable 1. In other words, in the conventional solution, a proper sequencecannot be found, where both a PAPR value of a sequence obtained afterthe proper sequence is repeated by using [+1 +1] and a PAPR value of asequence obtained after the proper sequence is repeated by using [+1 −1]are lower than a PAPR value of a PUSCH.

TABLE 2 PAPR with [s s] PAPR with [s −s] μ φ(0), . . . , φ(5)φ(0), . . ., φ(5) structure (dB) structure (dB) 0 −7 5 −7 −3 −5 5 1.4610 1.4479 1−7 −3 −7 −3 7 5 1.4610 1.5786 2 −7 −3 3 7 3 −3 1.5421 1.7852 3 −7 5 −7−3 7 5 1.6373 2.1837 4 −7 −3 −7 −3 −5 5 1.6373 2.2430 5 −7 1 −1 5 −7 51.6492 2.3795 6 −7 5 −1 1 −3 1 1.8773 2.3797 7 −7 −3 −7 −5 5 1 1.87732.3797 8 −7 −5 3 7 5 −1 1.9518 2.3822 9 −7 3 −3 −5 −1 7 1.9518 2.3905 10−7 1 −3 1 7 5 1.9574 2.3905 11 −7 −3 −3 −1 −7 5 1.9661 2.3905 12 −7 −7−3 1 −3 7 1.9661 2.4530 13 −7 5 −5 −1 −3 5 1.9682 2.4702 14 −7 −1 5 7 5−1 1.9911 2.5254 15 −7 3 −3 −5 −3 3 1.9911 2.5254 16 −7 −3 3 −1 −7 −51.9939 2.6289 17 −7 −3 −5 −3 7 3 1.9939 2.6671 18 −7 −1 −3 −1 7 3 2.02322.6671 19 −7 5 7 −1 −3 3 2.0314 2.9176 20 −7 −1 −3 5 7 3 2.0314 3.011321 −7 −1 3 7 3 −1 2.0425 3.4406 22 −7 3 −1 −5 −1 3 2.0425 3.4408 23 −7 33 7 −5 7 2.0490 3.4847 24 −7 5 −7 −3 −3 7 2.0491 3.5402 25 −7 −5 3 7 3−3 2.0927 3.6761 26 −7 3 −1 3 −5 −3 2.0928 3.7384 27 −7 1 −3 5 7 52.1111 3.7385 28 −7 5 −3 1 1 −1 2.1966 4.0684 29 −7 7 7 −5 3 −1 2.19664.0686

In another conventional solution, a DMRS sequence having a length of 6is used to generate a DMRS of a PUSCH/PUCCH whose frequency-domainbandwidth includes 12 subcarriers. The DMRS sequence having the lengthof 6 is mapped to six equi-spaced subcarriers, for example, mapped tobandwidth having a spacing of one subcarrier. To be specific, only oneof every two consecutive subcarriers carries a DMRS. The DMRS sequencehaving the length of 6 is generated based on any group of elements(Φ(0), . . . , Φ(5) in Table 1a. A generation manner includes: (Φ(0), .. . , Φ((5) are modulated by using 8PSK, and are mapped to odd-numberedsubcarriers and even-numbered subcarriers in frequency domain indifferent repetition manners. Assuming that a number of a startsubcarrier occupied by the DMRS is 0, the DMRS sequence may be mapped tothe even-numbered subcarriers after DFT transform is performed byrepetition way as {Φ(0), . . . , Φ(5), Φ(0), . . . , Φ(5)}, and the DMRSsequence may be mapped to the odd-numbered subcarriers after DFTtransform is performed on by repetition way as {Φ(0), . . . , Φ(5),−Φ(0), . . . , −Φ(5)}.

TABLE 1a μ Φ(0), . . . , Φ(5) PAPR (dB) 0 −7 5 −7 −3 −5 5 1.4610 1 −7 −3−7 −3 7 5 1.4610 2 −7 −3 3 7 3 −3 1.5421 3 −7 5 −7 −3 7 5 1.6373 4 −7 −3−7 −3 −5 5 1.6373 5 −7 1 −1 5 −7 5 1.6492 6 −7 5 −1 1 −3 1 1.8773 7 −7−3 −7 −5 5 1 1.8773 8 −7 −5 3 7 5 −1 1.9518 9 −7 3 −3 −5 −1 7 1.9518 10−7 1 −3 1 7 5 1.9574 11 −7 −3 −3 −1 −7 5 1.9661 12 −7 −7 −3 1 −3 71.9661 13 −7 5 −5 −1 −3 5 1.9682 14 −7 −1 5 7 5 −1 1.9911 15 −7 3 −3 −5−3 3 1.9911 16 −7 −3 3 −1 −7 −5 1.9939 17 −7 −3 −5 −3 7 3 1.9939 18 −7−1 −3 −1 7 3 2.0232 19 −7 5 7 −1 −3 3 2.0314 20 −7 −1 −3 5 7 3 2.0314 21−7 −1 3 7 3 −1 2.0425 22 −7 3 −1 −5 −1 3 2.0425 23 −7 3 3 7 −5 7 2.049024 −7 5 −7 −3 −3 7 2.0491 25 −7 −5 3 7 3 −3 2.0927 26 −7 3 −1 3 −5 −32.0928 27 −7 1 −3 5 7 5 2.1111 28 −7 5 −3 1 1 −1 2.1966 29 −7 7 7 −5 3−1 2.1966

A structure of comb-2 used for DMRS mapping in frequency domain is shownin FIG. 2. To be specific, for uplink transmission data of a user, aDMRS occupies only odd-numbered subcarriers or even-numberedsubcarriers. For a system, uplink transmission data of another user thatis scheduled at the same time may occupy the other group of subcarriers.

Sequences in Table 1a are modulated and then repeated in differentmanners, and are transformed, through DFT transform, into the frequencydomain for frequency-domain filtering. PARP values of sequences arefinally obtained, as shown in Table 2a. The foregoing transform processis shown in FIG. 3. For example, a modulated base sequence s_(N/2)having a length of N/2 is repeated to obtain s⁽⁰⁾=[s_(N/2), s_(N/2)] ands⁽¹⁾=[s_(N/2), −s_(N/2)], and then DFT transform is performed on s⁽⁰⁾and s⁽¹⁾ to obtain s⁽⁰⁾=DFT(s⁽⁰⁾) and s⁽¹⁾=DFT(s⁽¹⁾), where the sequences⁽⁰⁾ having a length of N occupies only even-numbered subcarriers shownin FIG. 2, and the sequence s⁽¹⁾ having a length of N occupies onlyodd-numbered subcarriers shown in FIG. 2.

It may be learned from the following Table 2a and the foregoing Table 1athat, after abase sequence s_(N/2) having a length of 6 is repeatedthrough {Φ(0), . . . , Φ(5), −Φ(0), . . . , −Φ(5)}, a PAPR is higherthan a PAPR value of the data.

TABLE 2a PAPR (dB) of PAPR (dB) of {Φ(0), . . . , Φ(5), {Φ(0), . . . ,Φ(5), μ Φ(0), . . . , Φ(5) Φ(0), . . . , Φ(5)} −Φ(0), . . . , −Φ(5)} 0−7 5 −7 −3 −5 5 1.4610 1.4479 1 −7 −3 −7 −3 7 5 1.4610 1.5786 2 −7 −3 37 3 −3 1.5421 1.7852 3 −7 5 −7 −3 7 5 1.6373 2.1837 4 −7 −3 −7 −3 −5 51.6373 2.2430 5 −7 1 −1 5 −7 5 1.6492 2.3795 6 −7 5 −1 1 −3 1 1.87732.3797 7 −7 −3 −7 −5 5 1 1.8773 2.3797 8 −7 −5 3 7 5 −1 1.9518 2.3822 9−7 3 −3 −5 −1 7 1.9518 2.3905 10 −7 1 −3 1 7 5 1.9574 2.3905 11 −7 −3 −3−1 −7 5 1.9661 2.3905 12 −7 −7 −31 −3 7 1.9661 2.4530 13 −7 5 −5 −1 −3 51.9682 2.4702 14 −7 −1 5 7 5 −1 1.9911 2.5254 15 −7 3 −3 −5 −3 3 1.99112.5254 16 −7 −3 3 −1 −7 −5 1.9939 2.6289 17 −7 −3 −5 −3 7 3 1.99392.6671 18 −7 −1 −3 −1 7 3 2.0232 2.6671 19 −7 5 7 −1 −3 3 2.0314 2.917620 −7 −1 −3 5 7 3 2.0314 3.0113 21 −7 −1 3 7 3 −1 2.0425 3.4406 22 −7 3−1 −5 −1 3 2.0425 3.4408 23 −7 3 3 7 −5 7 2.0490 3.4847 24 −7 5 −7 −3 −37 2.0491 3.5402 25 −7 −5 3 7 3 −3 2.0927 3.6761 26 −7 3 −1 3 −5 −32.0928 3.7384 27 −7 1 −3 5 7 5 2.1111 3.7385 28 −7 5 −3 1 1 −1 2.19664.0684 29 −7 7 7 −5 3 −1 2.1966 4.0686

FIG. 4 is a schematic flowchart of signal processing according to anembodiment of this application.

In this embodiment of this application, a transmit end may be aterminal, and a corresponding receive end is a network device; or atransmit end is a network device, and a receive end is a terminal. Thefollowing embodiment is described by using an example in which thetransmit end is a terminal, and the receive end is a network device.This is not limited in this application.

401: The terminal determines a first frequency-domain resource, wherethe first frequency-domain resource includes K subcarriers each having asubcarrier number of k, k=u+L*n+delta, n=0, 1, . . . , K−1, L is aninteger greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is aninteger, and the subcarrier numbers are sequentially numbered inascending or descending order of frequencies.

Specifically, when n is 0, 1, . . . , or K−1, subcarriers obtained basedon k=u+L*n+delta may constitute a comb structure. k is the subcarriernumber, u may be the subcarrier number of the first subcarrier in the Ksubcarriers, and a value of L may be determined based on the combstructure. For example, for a comb-2 structure (as shown in FIG. 2), Lis 2. For a comb-4 structure (as shown in FIG. 5), L is 4. A delta valuemay be any one of 0, 1, . . . , and L−1. The obtained firstfrequency-domain resource varies as the delta value varies. In otherwords, different delta values correspond to subcarrier combinations ondifferent combs. For example, as shown in FIG. 2, when delta=0, thefirst frequency-domain resource may include a subcarrier correspondingto a comb 1. When delta=1, the first frequency-domain resource mayinclude a subcarrier corresponding to a comb 2. That n is 0, 1, . . . ,or K−1 means that n is valued 0, 1, . . . , or K−1.

It should be understood that, in this embodiment of this application, afrequency-domain resource is described by using a “subcarrier” as anexample, but the frequency-domain resource may alternatively be acarrier or another frequency-domain unit. This is not limited in thisapplication.

It should be further understood that, the value of L varies as the combstructure comb-L varies, and may be another value. This is not limitedin this application.

It should be understood that, the foregoing step of determining thefirst sequence may be optional, or may be replaced with another step. Inan embodiment, before the reference signal is generated, the methodfurther includes: determining a first sequence based on the delta value.Specifically, the first sequence is determined based on a mappingrelationship. The mapping relationship may be stored after beingconfigured by another device or apparatus, or may be predefined. Themapping relationship may be a mapping relationship between a delta andthe first sequence, or may be a parameter in a generation formula. Inanother embodiment, the first sequence may alternatively be directlygenerated based on the delta value. The first sequence is associatedwith the delta value.

In another embodiment, the reference signal is sent on the firstfrequency-domain resource. The first frequency-domain resource includesa first subcarrier set, and there is a fixed subcarrier spacing betweensubcarriers in the first subcarrier set, for example, the firstsubcarrier set is in the foregoing comb-shaped form. For example, asubcarrier spacing in the first subcarrier set is one subcarrier. Using6 as an example, the first subcarrier set is {a0, a1, a2, a3, a4, a5}.If the spacing is one subcarrier, subcarriers that are in the firstsubcarrier set and arranged in ascending order in frequency domain maybe {a0, b, a1, c, a2, d, a3, e, a4, f, a5, g}, where b, c, d, e, f, andg are other subcarriers. When the first frequency-domain resource isdetermined, a used first sequence is determined based on an offset valueof the first subcarrier set. The offset value may be a relative offsetvalue or an absolute offset value. In an embodiment, if b, c, d, e, f,and g belong to a second subcarrier set, and all or some of b, c, d, e,f, and g constitute a second resource. That is, b, c, d, e, f, and g are{b0, b1, b2, b3, b4, b5} respectively. The subcarriers that are in thesubcarrier set and arranged in ascending order in frequency domain are{a0, b0, a1, b1, a2, b2, a3, b3, a4, b4, a5, b5}. Based on the relativeoffset value, because a position of a start subcarrier in the firstsubcarrier set is a0, and a position of a start subcarrier in the secondsubcarrier set is b0, a0 may be configured to generate the firstsequence, and b0 may be configured to generate a second sequence (whichis similar to the first sequence and is equivalent to a first sequenceof b0). That is, the first sequence and the second sequence aredetermined based on a relative position of a start position of the firstfrequency-domain resource. Because the two subcarrier sets are arrangedin a comb-shaped manner, the first sequence and the second sequence mayalternatively be directly determined based on positions of the twosubcarrier sets. The relative position may be determined throughcomparison, and the absolute position may be determined throughcalculation, for example, may be determined directly based on aparameter in a preset calculation rule (similar to delta in theforegoing embodiment), or may be determined directly based on anassociation relationship between a parameter and the first sequence. Forexample, in this embodiment, k=u+L*n+delta; when delta=0, thesubcarriers correspond to the first sequence; and when delta=1, thesubcarriers correspond to the second sequence. In this case, when (orbefore) sending the reference signal, the transmit end may determine,directly based on a resource corresponding to each reference signal inthe foregoing formula, a position and a first sequence, where the firstsequence is used at the position to generate the reference signal.

In another embodiment, calculation may be performed based on an offsetvalue. For uplink data transmission, for example, when transmissionprecoding is disabled,

a transmission sequence r(m) may be first mapped to a median valueã_(k,l) ^(({tilde over (p)}) ^(j) ^(, μ)) based on the followingrelationship:

${\overset{\sim}{a}}_{k,l}^{({{\overset{\sim}{p}}_{j},\mu})} = {{w_{f}\left( k^{\prime} \right)}{w_{t}\left( l^{\prime} \right)}{r\left( {{2n} + k^{\prime}} \right)}}$$k = \left\{ {{{\begin{matrix}{{4n} + {2k^{\prime}} + \Delta} & {{Configuration}\mspace{14mu}{type}\mspace{20mu} 1} \\{{6n} + k^{\prime} + \Delta} & {{Configuration}\mspace{14mu}{type}\mspace{14mu} 2}\end{matrix}k^{\prime}} = 0},{{1l} = {{\overset{\_}{l} + {l^{\prime}n}} = 0}},1,{{\ldots j} = 0},1,\ldots\mspace{14mu},{v - 1}} \right.$

and

when the transmission precoding is enabled:

the transmission sequence r(m) may be first mapped to a median valueã_(k,l) ^(({tilde over (p)}) ^(j) ^(, μ)) based on the followingrelationship:

ã _(k,l) ^(({tilde over (p)}) ^(j) ^(,μ)) =w _(f)(k′)w _(t)(l′)r(2n+k′)

k=4n+2k′+Δ

k′=0,1

n=0,1, . . .

A manner of mapping a sequence to a frequency-domain resource in thepresent disclosure is applicable to the foregoing configuration type 1.

Optionally, the median value is a signal, and after being transformed,the signal is mapped to a time-frequency resource including ksubcarriers and one OFDM symbol.

The configuration type may be configured by using higher layersignaling. For example, for DMRS-UplinkConfig, both k′ and Δ correspondto {tilde over (p)}₀, . . . , {tilde over (p)}_(v−1). (In an embodiment,Δ in the formula is delta in the foregoing embodiment). When k′ or Δdoes not correspond to {tilde over (p)}₀, . . . {tilde over (p)}_(v−1),a value of Δ may satisfy the following relationship (in an embodiment,for the first configuration manner type 1):

w_(f)(k′) w_(t)(1′) {tilde over (p)} CDM group Δ k′ = 0 k′ = 1 l′ = 0 l′= 1 0 0 0 +1 +1 +1 +1 1 0 0 +1 −1 +1 +1 2 1 1 +1 +1 +1 +1 3 1 1 +1 −1 +1+1 4 0 0 +1 +1 +1 −1 5 0 0 +1 −1 +1 −1 6 1 1 +1 +1 +1 −1 7 1 1 +1 −1 +1−1

(In an embodiment, for the first configuration manner type 2):

w_(f)(k′) w_(t)(1′) {tilde over (p)} CDM group Δ k′ = 0 k′ = 1 l′ = 0 l′= 1 0 0 0 +1 +1 +1 +1 1 0 0 +1 −1 +1 +1 2 1 2 +1 +1 +1 +1 3 1 2 +1 −1 +1+1 4 2 4 +1 +1 +1 +1 5 2 4 +1 −1 +1 +1 6 0 0 +1 +1 +1 −1 7 0 0 +1 −1 +1−1 8 1 2 +1 +1 +1 −1 9 1 2 +1 −1 +1 −1 10 2 4 +1 +1 +1 −1 11 2 4 +1 −1+1 −1

Optionally, downlink data is also applicable to the foregoing method.

Optionally, based on the foregoing association relationship, in thisembodiment of the present disclosure, the first sequence is directlydetermined based on the foregoing {tilde over (p)} and CDM group.

Optionally, based on the foregoing association relationship, in thisembodiment of the present disclosure, the first sequence is determineddirectly based on a time-frequency resource of the first signal.

Optionally, there is at least one first sequence group. In a samesequence length, a first sequence group includes two differentsequences.

In an embodiment, L=2, K=6, n=0, 1, 2, 3, 4, and 5, and delta=0.

Specifically, L=2 indicates that the comb structure is the comb-2. K=6indicates that the first frequency-domain resource includes sixsubcarriers. With reference to n=0, 1, 2, 3, 4, and 5, delta=0, andk=u+L*n+delta, the terminal may determine that the first frequencydomain includes subcarriers at odd-numbered positions, namely, combs 1in FIG. 2. In addition, based on K=6 and L=2, it may be further learnedthat the first frequency-domain resource may include subcarriers atodd-numbered positions in 12 subcarriers in one RB.

In another embodiment, if L=2, K=6, n=0, 1, 2, 3, 4, and 5, and delta=1,the first frequency-domain resource may include subcarriers shown bycombs 2 in FIG. 2.

402: The terminal determines the first sequence based on the deltavalue, where the first sequence varies as the delta values varies, and alength of the first sequence is K.

Specifically, that a length of the first sequence is K indicates thatthe first sequence includes K elements. The different delta values maycorrespond to different sequences. For example, a plurality of deltavalues may have a one-to-one mapping relationship with a plurality ofsequences. In this case, the terminal may determine, based on themapping relationship, a sequence corresponding to a delta value. Itshould be noted that the mapping relationship may be represented in aform of a list.

Optionally, the first sequence is neither a sequence modulated by usingBPSK nor a sequence modulated by using pi/2 BPSK.

Optionally, the first sequence is a sequence modulated by using any oneof 8 PSK, 16 PSK, or 32 PSK.

Specifically, different modulation schemes correspond to differentquantities of sequences. A quantity of sequences corresponding to anyone modulation scheme of 8 PSK, 16 PSK, or 32 PSK is greater than aquantity of sequences corresponding to the modulation scheme pi/2 BPSK.This helps select sequences with low correlations for frequency-domainresources on different combs to improve efficiency of communication onthe frequency-domain resources on different combs.

In an embodiment, the terminal may determine the first sequence groupbased on the delta value.

Specifically, frequency-domain resources corresponding to differentdelta values may be different subcarrier combinations. For example, asshown in FIG. 2, if delta=0, the first frequency-domain resourceincludes the subcarriers shown by the combs 1; and if delta=1, the firstfrequency-domain resource includes the subcarriers shown by the combs 2.A plurality of delta values have a mapping relationship with a pluralityof sequence groups. In this case, the terminal may determine, based onthe mapping relationship, the first sequence group corresponding to avalue (for example, a first delta value).

Different modulation schemes correspond to different quantities ofsequences. A quantity of sequences corresponding to any one modulationscheme of 8 PSK, 16 PSK, or 32 PSK is greater than a quantity ofsequences corresponding to the modulation scheme pi/2 BPSK. In thiscase, PAPRs of DMRS sequences carried on frequency-domain resources ondifferent combs are relatively low so that out-of-band spurious emissionand in-band signal loss are avoided, or uplink coverage is improved. Inaddition, it may further be ensured that characteristics such as anauto-correlation and frequency-domain flatness of DMRS sequences carriedon the frequency-domain resources of different combs are relatively lowso that DMRS-based channel estimation performance is improved.

In an embodiment, the terminal may determine the first sequence based onthe delta value and a cell identifier or a sequence group identifier.

Specifically, frequency-domain resources corresponding to differentdelta values may be different subcarrier combinations. For example, asshown in FIG. 2, if delta=0, the first frequency-domain resourceincludes the subcarriers shown by the combs 1; and if delta=1, the firstfrequency-domain resource includes the subcarriers shown by the combs 2.A plurality of delta values have a mapping relationship with a pluralityof sequence sets. The mapping relationship may be predefined. In thisway, the terminal may determine, based on the mapping relationship and adelta value (for example, a first delta value) at a current transmissionmoment, a sequence set in the plurality of sequence sets. The sequenceset corresponds to the first delta value. The terminal may determine,based on the cell identifier or the sequence group identifier, asequence in the sequence set as a sequence for generating a DMRS.

Optionally, the terminal may determine the first sequence based on thecell identifier or the sequence group identifier.

Specifically, both the terminal and the network device prestore aplurality of sequence groups, and each sequence group corresponds to acell identifier or a sequence group identifier. The terminal maydetermine, based on configuration information by the network device, asequence group used to transmit a DMRS, where the configurationinformation includes the cell identifier or the sequence groupidentifier. Therefore, different cells may use different sequencegroups, thereby reducing inter-cell signal interference. Further, aplurality of delta values have a predefined mapping relationship with aplurality of sequences in a sequence group, and the terminal determines,based on the delta value, a sequence in the sequence group as a sequencefor generating the DMRS.

Optionally, the terminal may determine the first sequence based on thecell identifier or the sequence group identifier.

Specifically, the terminal may group sequences having a same cellidentifier into one sequence group. In other words, different sequencegroups serve different cells respectively. Alternatively, the terminalmay agree on a sequence group identifier with the network device, anddifferent sequence group identifiers correspond to different sequencegroups. In this way, the terminal may determine a corresponding sequencegroup based on the sequence group identifier configured by the networkdevice. To be specific, the terminal may select a sequence from theproper sequence group to generate the reference signal so that the firstsignal can be accurately demodulated. This improves data transmissionquality.

Optionally, the terminal receives indication information. The indicationinformation is used to indicate a sequence that is in each of at leasttwo sequence groups and used to generate the reference signal.Correspondingly, the network device sends the indication information.

Specifically, the network device may send the indication information tothe terminal to indicate the sequence in each of the at least twosequence groups by using the indication information, that is, furthernotify the terminal to use the sequence in the sequence group. In thisway, the terminal generates the reference signal based on the sequenceindicated by the indication information. Compared with a manner in whichindication information is configured to select a sequence from eachsequence group, in this embodiment of this application, signalingoverheads can be reduced. It should be understood that step 401 and step402 are two optional steps.

403: The terminal generates the reference signal of the first signalbased on the first sequence, where the first signal is a signalmodulated by using pi/2 BPSK.

Specifically, the terminal may map K elements in the first sequence to Ksubcarriers respectively on the first frequency-domain resource, toobtain the reference signal.

It should be noted that, reference signals mapped to frequency-domainresources corresponding to different delta values may be differentreference signals of a same terminal, or may be reference signals ofdifferent terminals. This is not limited in this application.

It should be understood that, the first signal may be data or signalingmodulated by using pi/2 BPSK. This is not limited in this application.

It should be further understood that, the reference signal may be ademodulation reference signal (DMRS), UCI, an SRS, and a PTRS, or may beacknowledgment (ACK) information, negative acknowledgment (NACK)information, or uplink scheduling request (SR) information. This is notlimited in this application.

Optionally, when delta=0, the generating the reference signal of thefirst signal includes:

performing discrete Fourier transform on elements in a sequence {z(t)}to obtain a sequence {f(t)} with t=0, . . . , L*K−1, where when t=0, 1,. . . , L*K−1, z(t)=x(t mod K), and x(t) represents the first sequence;and

mapping elements numbered L*p+delta in the sequence {f(t)} tosubcarriers each having the subcarrier number of u+L*p+deltarespectively, to generate the reference signal, where p=0, . . . , K−1.

Optionally, when L=2 and delta=1, the generating the reference signal ofthe first signal includes:

performing discrete Fourier transform on elements in a sequence {z(t)}to obtain a sequence {f(t)} with t=0, . . . , L*K−1, where when t=0, . .. , K−1, z(t)=x(t), when t=K, . . . , L*K−1, z(t)=−x(t mod K), and x(t)represents the first sequence; and

mapping elements numbered L*p+delta in the sequence {f(t)} tosubcarriers each having the subcarrier number of L*p+delta respectively,to generate the reference signal, where p=0, . . . , K−1.

Optionally, when L=4, the generating the reference signal of the firstsignal includes:

performing discrete Fourier transform on elements in a sequence {z(t)}to obtain a sequence {f(t)} with t=0, . . . , 4K−1, where when t=0, 1, .. . , 4K−1,

${{z(t)} = {{w_{delta}\left( \left\lfloor \frac{t}{K} \right\rfloor \right)}x\;\left( {t\mspace{14mu}{mod}\mspace{14mu} K} \right)}},$

where w₀=(1, 1, 1, 1), w₁=(1, −1, 1 −1), w₂=(1, 1, −1, −1), w₃=(1, −1,−1, 1), └c┘ represents rounding down of c, and x(t) represents the firstsequence, where in another embodiment, w₀=(1, 1, 1, 1), w₁=(1, j, −1,−j), w₂=(1, −1, 1, −1), and w₃=(1, −j, −1, j); and

mapping elements numbered 4p+delta in the sequence {f(t)} to subcarrierseach having the subcarrier number of u+L*p+delta respectively togenerate the reference signal, where p=0, . . . , K−1, and w_(delta) mayrepresent a different OCC value when the delta varies.

Optionally, the generating the reference signal of the first signalincludes:

performing discrete Fourier transform on elements in a sequence {x(t)}to obtain a sequence {f(t)} with t=0, . . . , K−1, where x(t) representsthe first sequence; and

mapping elements numbered p in the sequence {f(t)} to subcarriers eachhaving the subcarrier number of u+L*p+delta respectively, to generatethe reference signal, where p=0, . . . , K−1.

Specifically, the terminal and the network device may pre-agree onsequence combinations corresponding to different modulation schemes. Forexample, 30 sequences are selected from a plurality of sequencesmodulated by using 16 PSK, and the 30 sequences may be sequences used togenerate reference signals with relatively high performance. Theterminal then selects the first sequence from the sequence combinationto generate the reference signal. Therefore, efficiency of communicationbetween the terminal and the network device is improved.Correspondingly, the terminal or the network device may alternativelyselect 30 sequences from a plurality of sequences modulated by using 8PSK, or may alternatively select 30 sequences from a plurality ofsequences modulated by using 32 PSK. Herein, a principle of x_(n)obtained by using the following two formulas may be further described.In this case, for the comb-2 structure, the terminal may determine,based on a preset condition and a sequence {s(n)}, the first sequenceused to generate the reference signal transmitted on the combs 1 in thecomb-2.

Optionally, when delta=0, the method further includes:

determining the first sequence {x(n)} based on the preset condition andthe sequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −5, 5, 11, −13, 11}, {1, −5, 3, 13, 3, −5}, {1, −5, 5, 13, 5, 11},{1, −9, −5, 5, 15, 11}, {1, 9, −15, 11, −13, 11}, {1, 9, −15, 11, 3,11}, {1, 11, −11, −9, 13, 3}, {1, −7, 7, 15, 11, 15}, {1, −9, −1, −5,−15, −7}, {1, −13, −9, −15, −5, 7}, {1, −1, 7, 15, 3, 11}, {1, 9, −15,15, −9, 11}, {1, 15, 7, −5, −11, −9}, {1, 11, 15, −3, −13, 5}, {1, 9,−15, 15, 7, 15}, {1, 9, −15, 9, 7, 15}, {1, −11, −3, 11, −15, 13}, {1,11, 1, 5, −9, −9}, {1, −3, 9, −1, −15, −11}, {1, 15, −13, 7, −5, −9},{1, 11, −3, 3, 1, −9}, {1, −11, −13, 9, −13, −3}, {1, −11, −7, 3, 13,3}, {1, −11, 11, −11, −7, 3}, {1, −11, −15, −9, 3, 11}, {1, 15, 5, −9,−7, −9}, {1, 11, 15, 9, −1, −11}, {1, −11, −1, −5, 5, 11}, {1, 7, −5, 5,15, 11}, or {1, 11, 3, 13, −13, 15}; or

{1, −11, 11, −1, 7, 13}, {1, −3, −13, 15, −5, 5}, {1, −11, 11, −1, 3,13}, {1, 13, −9, 3, −3, −13}, {1, −11, 11, −1, 7, 13}, {1, −3, 9, −13,−1, −9}, {1, 11, 13, 1, −9, 11}, {1, 11, −9, 13, 7, 5}, {1, 3, −9, 13,1, 11}, {1, 11, −9, 15, 7, 5}, {1, −11, −3, 5, 7, −5}, {1, 7, −15, 5,−5, 15}, {1, −5, −15, −3, 7, −13}, {1, 9, 13, 1, −9, 11}, {1, −7, −11,1, 11, −9}, {1, 9, −3, −13, 7, 11}, {1, 11, −9, −13, 13, 5}, {1, −9,−15, −3, 7, −13}, {1, −11, −9, 1, 7, −5}, {1, 9, −3, −13, 7, 9}, {1, 13,11, 3, −5, 7}, {1, 13, 9, 1, −5, 7}, {1, 9, 15, 3, −7, 13}, {1, −7, 5,13, −7, −15}, {1, 1, 9, −3, −11, 9}, {1, −11, −5, 1, 7, −5}, {1, −5,−11, 1, 11, −9}, {1, −9, 1, 11, −9, −15}, {1, 13, −9, 1, −5, −15}, {1,−5, 7, −15, −5, −15}, {1, −9, 11, −15, −15, −5}, {1, −9, −15, −5, 5,−15}, {1, −9, 13, −13, −3, −3}, {1, −9, 13, 1, 1, 11}, {1, −9, 1, 1, 7,−5}, {1, −11, −15, −3, 7, −13}, {1, −11, −13, −1, 9, −11}, {1, 3, 15,−13, 7, −3}, {1, −11, −7, 5, 7, −5}, {1, 11, 11, 1, −9, 9}, {1, 15, 7,−3, −3, 7}, {1, −9, 13, 13, −9, −1}, {1, 11, 11, 1, −7, 7}, {1, −11, −3,3, −9, −5}, {1, 7, 15, 3, −7, −3}, {1, 11, 7, −13, 13, 5}, {1, 13, 5,−1, 11, 7}, {1, −11, −3, 1, 7, −5}, {1, −11, −5, −1, 7, −5}, {1, −3,−11, 1, 11, −9}, {1, 13, −9, 3, −5, −9}, {1, 11, −1, −11, 9, 15}, {1,11, 13, −13, 7, −3}, {1, 11, −9, −15, 15, 5}, {1, 11, −9, 13, 11, 5},{1, −11, −3, 5, −7, −5}, {1, −7, −15, −3, 7, 5}, {1, −7, −15, −3, −5,5}, {1, −9, −7, 13, −11, −3}, {1, −7, −15, −15, −5, 5}, {1, 11, 11, 3,−5, 7}, {1, 13, −9, 1, −7, −15}, {1, 9, 9, −1, −11, 9}, {1, −9, −9, −1,7, −5}, {1, −9, −1, 7, 7, −5}, {1, −9, 13, 1, 1, 9}, {1, 13, 13, 5, −3,7}, {1, 15, 7, −1, −3, 7}, {1, 11, 9, 1, −7, 7}, {1, −9, −7, 1, 9, −5},{1, 3, −7, 15, 1, 9}, {1, −9, −15, −3, 5, −15}, {1, −5, −15, −15, −3,5}, {1, 1, 11, −15, 5, −3}, {1, −7, 13, −13, −3, −3}, {1, −7, 3, 13, −7,−15}, {1, −7, 5, 15, −7, −15}, {1, −9, 13, −11, −11, −3}, {1, −11, −3,−3, 5, −5}, {1, −11, −3, 3, −9, 13}, {1, −11, −7, 1, −11, −5}, {1, −7,−11, 1, 11, 5}, {1, −3, −11, 1, 11, 5}, {1, −11, −3, 1, −11, −5}, {1,11, 15, −13, 7, −3}, {1, 7, 15, 3, 7, −3}, {1, −9, −3, −15, −11, −3},{1, 5, 15, 3, −7, 13}, {1, 11, 7, −13, 11, 5}, {1, −9, −3, −15, −7, −3},{1, −3, −11, 1, −5, 5}, {1, −7, −11, 1, −5, 5}, {1, −3, 9, −13, −1,−11}, {1, −9, 3, 13, −7, −11}, {1, 13, 7, −1, 11, 7}, {1, −5, −11, 1,11, 5}, {1, −11, −5, 1, −11, −5}, {1, −9, −3, −15, −9, −3}, {1, −5, −11,1, −5, 5}, {1, 11, −11, 1, −5, −15}, {1, −9, −15, −3, 7, −15}, {1, 11,11, 1, −9, 11}, {1, 1, 11, −15, 5, −5}, {1, 9, 11, −1, −11, −3}, {1, 11,3, 15, 7, 5}, {1, 3, 11, −1, 7, −3}, {1, −7, 5, −3, 7, −13}, {1, −9,−11, 1, 11, 5}, {1, −1, −11, 1, 11, 5}, {1, −11, −9, 1, −11, −5}, {1,11, −1, −11, −5, 15}, {1, −11, −1, 1, −11, −5}, {1, −9, −3, −15, −5,−3}, {1, −1, −11, 1, −5, 5}, or {1, −9, −11, 1, −5, 5}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on the preset condition and thesequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −7, 13, −13, −11, −3}, {1, −7, −9, −15, −3, 5}, {1, 5, 15, −15, 5,−3}, {1, 13, 11, 1, −3, 9}, {1, 11, 3, 15, 11, 5}, {1, −11, −3, 3, −9,−5}, {1, −11, −3, 3, −9, 13}, {1, −7, 3, 15, 11, 5}, {1, −3, 7, −13, 9,5}, {1, 11, 7, −13, 9, 5}, {1, 13, −9, 1, −9, −15}, {1, −9, 13, 1, 1,7}, {1, 3, 11, −1, −11, −3}, {1, 3, 11, −1, 7, −3}, {1, 9, −1, 7, 9,−3}, {1, 11, −11, 13, 15, −7}, {1, −7, 3, −5, −3, 7}, {1, 9, 7, −3, 5,−5}, {1, 13, 15, 7, −3, 5}, {1, −7, 3, 11, 9, −3}, {1, 13, −7, −5, −15,−7}, {1, −7, 13, 15, −3, 3}, {1, −13, −15, −3, 5, −9}, {1, 15, 11, −1,11, 7}, {1, −3, 11, 7, −5, 5}, {1, −13, −9, 3, −7, −3}, {1, 7, 7, −5,−15, −3}, {1, 11, 1, 11, −11, −9}, {1, −5, 5, −7, −11, 9}, or {1, −9, 1,3, −3, 7}; or

{1, 9, −15, −7, −15, 9}, {1, −5, 3, 13, −13, 11}, {1, 11, −13, 13, 3,−5}, {1, −5, 1, 9, −13, 11}, {1, −5, 5, 11, −13, 9}, {1, −7, −13, 9, 15,−9}, {1, −7, 3, 11, −15, 11}, {1, −9, −3, −9, −1, 9}, {1, 9, 3, 9, −1,−9}, {1, −5, −13, 9, −15, −9}, {1, −5, −13, 9, 15, −9}, {1, −5, −15, 9,15, −9}, {1, −9, 15, 9, −13, −5}, {1, −9, −15, 9, −13, −5}, {1, −7, 15,9, −13, −5}, {1, −9, −5, 5, 15, 11}, {1, 11, 15, 5, −5, −9}, {1, −7,−15, 9, −13, −5}, {1, −7, 1, 9, −15, 11}, {1, 9, −15, −7, −15, 11}, {1,9, −15, −7, −13, 11}, {1, −7, −15, 9, 15, −9}, {1, −5, −13, −5, 3, 11},{1, −7, −13, −5, 3, 11}, {1, 9, −15, 9, −1, −7}, {1, −5, 1, −11, 15,−7}, {1, −5, 5, 15, −13, 11}, {1, 9, −13, 15, 5, −5}, {1, 9, 5, −5, −15,−9}, {1, 9, −1, −11, −15, −9}, {1, 9, 15, 5, −5, −9}, {1, −9, −1, 9, 15,11}, {1, −5, 3, 13, 7, −5}, {1, −9, 15, −13, −3, 7}, {1, 7, −3, −13, 15,−9}, {1, −7, −1, −13, 15, −7}, {1, 9, −13, 15, 3, 9}, {1, 9, 5, −5, −15,−7}, {1, 9, −1, −11, −15, −7}, {1, 5, −9, −15, −3, 7}, {1, −13, −9, −15,−5, 7}, {1, −5, 7, 15, 9, 15}, {1, −5, 3, 15, 9, −5}, {1, 9, 15, 9, −3,−11}, {1, 11, 7, 11, −3, −11}, {1, −11, −5, −11, −3, 9}, {1, −7, 3, 15,11, −3}, {1, 9, 3, 9, −3, −11}, {1, 11, 3, 7, −7, −11}, {1, 7, 15, −5,−13, 7}, {1, −3, 7, −13, 11, −3}, {1, 11, 3, −9, −15, −9}, {1, −9, −15,−3, 3, 11}, {1, 11, 5, −7, −1, −9}, {1, 7, −5, −11, −1, 9}, {1, −7, 3,13, −13, 13}, {1, −9, 13, −11, −5, 7}, {1, 9, 15, 7, −3, −11}, {1, 11,15, 9, −3, −11}, {1, 11, 3, −7, −15, −7}, {1, 11, 1, −9, −15, −5}, {1,11, 3, −9, −15, −7}, {1, 11, 5, 9, −3, −11}, {1, 7, 15, 7, −3, −11}, {1,11, 5, −5, −15, −5}, {1, 11, 5, −7, −15, −7}, {1, −11, −7, −11, −1, 11},{1, 11, 7, 11, −1, −11}, {1, 11, 15, 11, −1, −11}, {1, −11, −15, −11,−1, 11}, {1, 9, −15, 9, 5, −5}, {1, −7, −13, 11, −13, −5}, {1, 9, −15,9, 3, −5}, {1, 5, 3, 11, −11, 13}, {1, −9, −13, 11, −13, −5}, {1, −7, 3,11, −13, 13}, {1, −7, 3, 11, −13, 11}, {1, −7, −1, 7, −13, 11}, {1, −11,13, −9, −1, −3}, {1, −7, 1, 7, −13, 11}, {1, 11, −13, 13, 1, −7}, {1,−7, 13, 7, −15, −7}, {1, −11, −7, −13, −3, 9}, {1, 11, −13, 11, −1, −7},{1, 5, 15, −5, −13, 7}, {1, 11, 3, −7, −15, −5}, {1, 11, 1, −9, −15,−7}, {1, −9, 13, −9, −1, 7}, {1, −11, −15, −5, 1, 11}, {1, −11, −15, −9,1, 11}, {1, 11, 7, −5, −15, −5}, {1, 11, 5, 9, −1, −11}, {1, −9, −5,−11, −1, 11}, {1, 9, −15, −9, 13, 11}, {1, 7, 3, −9, 13, −9}, {1, 9, 15,−9, 13, 11}, {1, 7, 15, −9, 13, 11}, {1, −9, −15, −5, 3, 11}, {1, 11, 5,−5, −15, −7}, {1, 11, 3, −7, −1, −9}, or {1, 7, −3, −11, −1, 9}.

Optionally, when delta=0, the method further includes:

determining the first sequence {x(n)} based on the preset condition andthe sequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −5, 5, 11, −13, 11}, {1, −5, 3, 13, 3, −5}, {1, −5, 5, 13, 5, 11},{1, −9, −5, 5, 15, 11}, {1, 9, −15, 11, −13, 11}, {1, 9, −15, 11, 3,11}, {1, 11, −11, −9, 13, 3}, {1, −7, 7, 15, 11, 15}, {1, −9, −1, −5,−15, −7}, {1, −13, −9, −15, −5, 7}, {1, −1, 7, 15, 3, 11}, {1, 9, −15,15, −9, 11}, {1, 15, 7, −5, −11, −9}, {1, 11, 15, −3, −13, 5}, {1, 9,−15, 15, 7, 15}, {1, 9, −15, 9, 7, 15}, {1, −11, −3, 11, −15, 13}, {1,11, 1, 5, −9, −9}, {1, −3, 9, −1, −15, −11}, {1, 15, −13, 7, −5, −9},{1, 11, −3, 3, 1, −9}, {1, −11, −13, 9, −13, −3}, {1, −11, −7, 3, 13,3}, {1, −11, 11, −11, −7, 3}, {1, −11, −15, −9, 3, 11}, {1, 15, 5, −9,−7, −9}, {1, 11, 15, 9, −1, −11}, {1, −11, −1, −5, 5, 11}, {1, 7, −5, 5,15, 11}, or {1, 11, 3, 13, −13, 15} (where these sequences are denotedas a sequence set A for ease of subsequent description); or

{1, 9, −15, −7, −15, 9}, {1, −5, 3, 13, −13, 11}, {1, 11, −13, 13, 3,−5}, {1, −5, 1, 9, −13, 11}, {1, −5, 5, 11, −13, 9}, {1, −7, −13, 9, 15,−9}, {1, −7, 3, 11, −15, 11}, {1, −9, −3, −9, −1, 9}, {1, 9, 3, 9, −1,−9}, {1, −5, −13, 9, −15, −9}, {1, −5, −13, 9, 15, −9}, {1, −5, −15, 9,15, −9}, {1, −9, 15, 9, −13, −5}, {1, −9, −15, 9, −13, −5}, {1, −7, 15,9, −13, −5}, {1, −9, −5, 5, 15, 11}, {1, 11, 15, 5, −5, −9}, {1, −7,−15, 9, −13, −5}, {1, −7, 1, 9, −15, 11}, {1, 9, −15, −7, −15, 11}, {1,9, −15, −7, −13, 11}, {1, −7, −15, 9, 15, −9}, {1, −5, −13, −5, 3, 11},{1, −7, −13, −5, 3, 11}, {1, 9, −15, 9, −1, −7}, {1, −5, 1, −11, 15,−7}, {1, −5, 5, 15, −13, 11}, {1, 9, −13, 15, 5, −5}, {1, 9, 5, −5, −15,−9}, {1, 9, −1, −11, −15, −9}, {1, 9, 15, 5, −5, −9}, {1, −9, −1, 9, 15,11}, {1, −5, 3, 13, 7, −5}, {1, −9, 15, −13, −3, 7}, {1, 7, −3, −13, 15,−9}, {1, −7, −1, −13, 15, −7}, {1, 9, −13, 15, 3, 9}, {1, 9, 5, −5, −15,−7}, {1, 9, −1, −11, −15, −7}, {1, 5, −9, −15, −3, 7}, {1, −13, −9, −15,−5, 7}, {1, −5, 7, 15, 9, 15}, {1, −5, 3, 15, 9, −5}, {1, 9, 15, 9, −3,−11}, {1, 11, 7, 11, −3, −11}, {1, −11, −5, −11, −3, 9}, {1, −7, 3, 15,11, −3}, {1, 9, 3, 9, −3, −11}, {1, 11, 3, 7, −7, −11}, {1, 7, 15, −5,−13, 7}, {1, −3, 7, −13, 11, −3}, {1, 11, 3, −9, −15, −9}, {1, −9, −15,−3, 3, 11}, {1, 11, 5, −7, −1, −9}, {1, 7, −5, −11, −1, 9}, {1, −7, 3,13, −13, 13}, {1, −9, 13, −11, −5, 7}, {1, 9, 15, 7, −3, −11}, {1, 11,15, 9, −3, −11}, {1, 11, 3, −7, −15, −7}, {1, 11, 1, −9, −15, −5}, {1,11, 3, −9, −15, −7}, {1, 11, 5, 9, −3, −11}, {1, 7, 15, 7, −3, −11}, {1,11, 5, −5, −15, −5}, {1, 11, 5, −7, −15, −7}, {1, −11, −7, −11, −1, 11},{1, 11, 7, 11, −1, −11}, {1, 11, 15, 11, −1, −11}, {1, −11, −15, −11,−1, 11}, {1, 9, −15, 9, 5, −5}, {1, −7, −13, 11, −13, −5}, {1, 9, −15,9, 3, −5}, {1, 5, 3, 11, −11, 13}, {1, −9, −13, 11, −13, −5}, {1, −7, 3,11, −13, 13}, {1, −7, 3, 11, −13, 11}, {1, −7, −1, 7, −13, 11}, {1, −11,13, −9, −1, −3}, {1, −7, 1, 7, −13, 11}, {1, 11, −13, 13, 1, −7}, {1,−7, 13, 7, −15, −7}, {1, −11, −7, −13, −3, 9}, {1, 11, −13, 11, −1, −7},{1, 5, 15, −5, −13, 7}, {1, 11, 3, −7, −15, −5}, {1, 11, 1, −9, −15,−7}, {1, −9, 13, −9, −1, 7}, {1, −11, −15, −5, 1, 11}, {1, −11, −15, −9,1, 11}, {1, 11, 7, −5, −15, −5}, {1, 11, 5, 9, −1, −11}, {1, −9, −5,−11, −1, 11}, {1, 9, −15, −9, 13, 11}, {1, 7, 3, −9, 13, −9}, {1, 9, 15,−9, 13, 11}, {1, 7, 15, −9, 13, 11}, {1, −9, −15, −5, 3, 11}, {1, 11, 5,−5, −15, −7}, {1, 11, 3, −7, −1, −9}, or {1, 7, −3, −11, −1, 9} (wherethese sequences are denoted as a sequence set B for ease of subsequentdescription).

Optionally, when delta=1, the method further includes:

determining the first sequence based on the preset condition and thesequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s(n)} includes at least one of the following sequences:

{1, −7, 13, −13, −11, −3}, {1, −7, −9, −15, −3, 5}, {1, 5, 15, −15, 5,−3}, {1, 13, 11, 1, −3, 9}, {1, 11, 3, 15, 11, 5}, {1, −11, −3, 3, −9,−5}, {1, −11, −3, 3, −9, 13}, {1, −7, 3, 15, 11, 5}, {1, −3, 7, −13, 9,5}, {1, 11, 7, −13, 9, 5}, {1, 13, −9, 1, −9, −15}, {1, −9, 13, 1, 1,7}, {1, 3, 11, −1, −11, −3}, {1, 3, 11, −1, 7, −3}, {1, 9, −1, 7, 9,−3}, {1, 11, −11, 13, 15, −7}, {1, −7, 3, −5, −3, 7}, {1, 9, 7, −3, 5,−5}, {1, 13, 15, 7, −3, 5}, {1, −7, 3, 11, 9, −3}, {1, 13, −7, −5, −15,−7}, {1, −7, 13, 15, −3, 3}, {1, −13, −15, −3, 5, −9}, {1, 15, 11, −1,11, 7}, {1, −3, 11, 7, −5, 5}, {1, −13, −9, 3, −7, −3}, {1, 7, 7, −5,−15, −3}, {1, 11, 1, 11, −11, −9}, {1, −5, 5, −7, −11, 9}, or {1, −9, 1,3, −3, 7} (where these sequences are denoted as a sequence set C forease of subsequent description); or

{1, −11, 11, −1, 7, 13}, {1, −3, −13, 15, −5, 5}, {1, −11, 11, −1, 3,13}, {1, 13, −9, 3, −3, −13}, {1, −11, 11, −1, 7, 13}, {1, −3, 9, −13,−1, −9}, {1, 11, 13, 1, −9, 11}, {1, 11, −9, 13, 7, 5}, {1, 3, −9, 13,1, 11}, {1, 11, −9, 15, 7, 5}, {1, −11, −3, 5, 7, −5}, {1, 7, −15, 5,−5, 15}, {1, −5, −15, −3, 7, −13}, {1, 9, 13, 1, −9, 11}, {1, −7, −11,1, 11, −9}, {1, 9, −3, −13, 7, 11}, {1, 11, −9, −13, 13, 5}, {1, −9,−15, −3, 7, −13}, {1, −11, −9, 1, 7, −5}, {1, 9, −3, −13, 7, 9}, {1, 13,11, 3, −5, 7}, {1, 13, 9, 1, −5, 7}, {1, 9, 15, 3, −7, 13}, {1, −7, 5,13, −7, −15}, {1, 1, 9, −3, −11, 9}, {1, −11, −5, 1, 7, −5}, {1, −5,−11, 1, 11, −9}, {1, −9, 1, 11, −9, −15}, {1, 13, −9, 1, −5, −15}, {1,−5, 7, −15, −5, −15}, {1, −9, 11, −15, −15, −5}, {1, −9, −15, −5, 5,−15}, {1, −9, 13, −13, −3, −3}, {1, −9, 13, 1, 1, 11}, {1, −9, 1, 1, 7,−5}, {1, −11, −15, −3, 7, −13}, {1, −11, −13, −1, 9, −11}, {1, 3, 15,−13, 7, −3}, {1, −11, −7, 5, 7, −5}, {1, 11, 11, 1, −9, 9}, {1, 15, 7,−3, −3, 7}, {1, −9, 13, 13, −9, −1}, {1, 11, 11, 1, −7, 7}, {1, −11, −3,3, −9, −5}, {1, 7, 15, 3, −7, −3}, {1, 11, 7, −13, 13, 5}, {1, 13, 5,−1, 11, 7}, {1, −11, −3, 1, 7, −5}, {1, −11, −5, −1, 7, −5}, {1, −3,−11, 1, 11, −9}, {1, 13, −9, 3, −5, −9}, {1, 11, −1, −11, 9, 15}, {1,11, 13, −13, 7, −3}, {1, 11, −9, −15, 15, 5}, {1, 11, −9, 13, 11, 5},{1, −11, −3, 5, −7, −5}, {1, −7, −15, −3, 7, 5}, {1, −7, −15, −3, −5,5}, {1, −9, −7, 13, −11, −3}, {1, −7, −15, −15, −5, 5}, {1, 11, 11, 3,−5, 7}, {1, 13, −9, 1, −7, −15}, {1, 9, 9, −1, −11, 9}, {1, −9, −9, −1,7, −5}, {1, −9, −1, 7, 7, −5}, {1, −9, 13, 1, 1, 9}, {1, 13, 13, 5, −3,7}, {1, 15, 7, −1, −3, 7}, {1, 11, 9, 1, −7, 7}, {1, −9, −7, 1, 9, −5},{1, 3, −7, 15, 1, 9}, {1, −9, −15, −3, 5, −15}, {1, −5, −15, −15, −3,5}, {1, 1, 11, −15, 5, −3}, {1, −7, 13, −13, −3, −3}, {1, −7, 3, 13, −7,−15}, {1, −7, 5, 15, −7, −15}, {1, −9, 13, −11, −11, −3}, {1, −11, −3,−3, 5, −5}, {1, −11, −3, 3, −9, 13}, {1, −11, −7, 1, −11, −5}, {1, −7,−11, 1, 11, 5}, {1, −3, −11, 1, 11, 5}, {1, −11, −3, 1, −11, −5}, {1,11, 15, −13, 7, −3}, {1, 7, 15, 3, 7, −3}, {1, −9, −3, −15, −11, −3},{1, 5, 15, 3, −7, 13}, {1, 11, 7, −13, 11, 5}, {1, −9, −3, −15, −7, −3},{1, −3, −11, 1, −5, 5}, {1, −7, −11, 1, −5, 5}, {1, −3, 9, −13, −1,−11}, {1, −9, 3, 13, −7, −11}, {1, 13, 7, −1, 11, 7}, {1, −5, −11, 1,11, 5}, {1, −11, −5, 1, −11, −5}, {1, −9, −3, −15, −9, −3}, {1, −5, −11,1, −5, 5}, {1, 11, −11, 1, −5, −15}, {1, −9, −15, −3, 7, −15}, {1, 11,11, 1, −9, 11}, {1, 1, 11, −15, 5, −5}, {1, 9, 11, −1, −11, −3}, {1, 11,3, 15, 7, 5}, {1, 3, 11, −1, 7, −3}, {1, −7, 5, −3, 7, −13}, {1, −9,−11, 1, 11, 5}, {1, −1, −11, 1, 11, 5}, {1, −11, −9, 1, −11, −5}, {1,11, −1, −11, −5, 15}, {1, −11, −1, 1, −11, −5}, {1, −9, −3, −15, −5,−3}, {1, −1, −11, 1, −5, 5}, or {1, −9, −11, 1, −5, 5} (where thesesequences are denoted as a sequence set D for ease of subsequentdescription).

Optionally, when delta=0, the method further includes:

determining the first sequence based on the preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 3, 1, −5, 1, 7}, {1, −3, 3, 1, 7, −7}, {1, −5, 5, 5, −5, 1}, {1, 7,1, −1, 1, −5}, {1, 7, 1, −1, −7, −1}, {1, 5, 1, −7, −3, −5}, {1, 7, 1,−5, −3, 3}, {1, 5, 1, −1, 3, −7}, {1, 5, 1, −5, 7, −1}, {1, 3, 1, 7, −3,−7}, {1, 5, 1, −1, 3, −3}, {1, −3, 1, 5, −1, 3}, {1, −5, 1, 3, −7, 7},{1, −3, 1, −7, 7, −5}, {1, −3, 5, −7, −5, 5}, {1, 5, 1, −5, −1, −3}, {1,7, 5, −1, −7, −5}, {1, −3, 1, 5, 3, −7}, {1, −5, 5, 3, −7, −1}, {1, 5,1, 5, −5, −7}, {1, 3, 1, −5, 5, −7}, {1, 5, 1, −3, 1, 5}, {1, 7, 1, −5,−7, −1}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −5, −1, 3}, {1, −1, 1, −7, −3,7}, {1, −3, 1, 5, −7, 7}, {1, 5, 1, 7, −1, −3}, {1, −3, 1, −5, −1, 5},or {1, −7, 5, −1, −5, −3} (where these sequences are denoted as asequence set E for ease of subsequent description); or

{1, 3, 1, −5, 1, 7}, {1, 3, 1, −5, 5, −7}, {1, 3, 1, 7, −3, −7}, {1, 3,1, −5, 7, −3}, {1, 5, 1, −5, −1, 3}, {1, 5, 1, −5, 1, 5}, {1, 5, 1, −3,1, 5}, {1, 5, 1, 5, −7, 5}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −3, 3, 7},{1, 5, 1, −1, 3, 7}, {1, 5, 1, 5, −5, 7}, {1, 5, 1, −1, 3, −7}, {1, 5,1, 5, −5, −7}, {1, 5, 1, −7, −3, −5}, {1, 5, 1, 5, −1, −5}, {1, 5, 1, 7,1, −3}, {1, 5, 1, −5, 1, −3}, {1, 5, 1, −1, 3, −3}, {1, 5, 1, −5, 7,−3}, {1, 5, 1, −5, −7, −3}, {1, 5, 1, −3, −7, −3}, {1, 5, 1, 7, −1, −3},{1, 5, 1, −7, −1, −3}, {1, 5, 1, −5, −1, −3}, {1, 5, 1, −5, 7, −1}, {1,7, 1, −5, −3, 3}, {1, 7, 1, −1, 1, −5}, {1, 7, 1, −5, −7, −1}, {1, 7, 1,−1, −7, −1}, {1, −5, 1, −1, 5, 7}, {1, −5, 1, 3, −7, 7}, {1, −3, 1, 5,−1, 3}, {1, −3, 1, −7, −1, 3}, {1, −3, 1, −5, −1, 3}, {1, −3, 1, −5, −1,5}, {1, −3, 1, 5, 3, 7}, {1, −3, 1, −1, 3, 7}, {1, −3, 1, 5, −7, 7}, {1,−3, 1, 3, −5, 7}, {1, −3, 1, 5, −5, 7}, {1, −3, 1, 5, 3, −7{ }, {1, −3,1, 5, 3, −5}, {1, −3, 1, −7, 7, −5}, {1, −1, 1, 5, −5, 7}, {1, −1, 1,−7, −3, 7}, {1, 5, 3, 7, −3, −7}, {1, 5, 3, 7, −1, −5}, {1, 7, 3, −5,−3, 3}, {1, 7, 3, −1, −7, −3}, {1, −3, 3, 7, −5, 5}, {1, −3, 3, 1, 7,−7}, {1, 7, 5, −1, −7, −5}, {1, −7, 5, 1, −5, −3}, {1, −7, 5, −1, −5,−3}, {1, −7, 5, 1, −5, −1}, {1, −5, 5, 5, −5, 1}, {1, −5, 5, 3, −7, −1},{1, −3, 5, 7, −5, 5}, {1, −3, 5, −7, −5, 5}, or {1, −3, 5, −7, −5, 7}(where these sequences are denoted as a sequence set F for ease ofsubsequent description).

Optionally, when delta=0, the method further includes:

determining the first sequence based on the preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y(n+M)_(mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 1, 3, −7, 5, −3}, {1, 1, 5, −7, 3, 5}, {1, 1, 5, −5, −3, 7}, {1, 1,−7, −5, 5, −7}, {1, 1, −7, −3, 7, −7}, {1, 3, 1, 7, −1, −5}, {1, 3, 1,−7, −3, 7}, {1, 3, 1, −7, −1, −5}, {1, 3, 3, 7, −1, −5}, {1, 5, 1, 1,−5, −3}, {1, 5, 1, 3, −5, 5}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 3, −3, 1},{1, 5, 1, 3, −1, −7}, {1, 5, 1, 5, 3, −7}, {1, 5, 1, 5, 3, −5}, {1, 5,1, 5, 7, 7}, {1, 5, 1, 5, −5, 3}, {1, 5, 1, 5, −3, 3}, {1, 5, 1, 5, −1,3}, {1, 5, 1, 5, −1, −1}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, −5, 5}, {1,5, 1, −5, 3, 5}, {1, 5, 1, −5, −7, −1}, {1, 5, 1, −5, −5, −3}, {1, 5, 1,−5, −3, 1}, {1, 5, 1, −5, −1, 1}, {1, 5, 1, −5, −1, 5}, {1, 5, 1, −5,−1, −1}, {1, 5, 1, −3, 1, 7}, {1, 5, 1, −3, 1, −5}, {1, 5, 1, −3, 7,−7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1, 5, 1, −1, 3, −5},{1, 5, 1, −1, 5, −7}, {1, 5, 1, −1, −7, −3}, {1, 5, 1, −1, −5, −3}, {1,5, 3, −3, −7, −5}, {1, 5, 3, −3, −7, −1}, {1, 5, 3, −3, −1, −7}, {1, 5,3, −1, 5, −7}, {1, 5, 3, −1, −5, −3}, {1, 5, 5, 1, 3, −3}, {1, 5, 5, −1,−7, −5}, {1, 7, 1, 1, 1, −5}, {1, 7, 1, 1, −7, −7}, {1, 7, 1, 1, −5,−5}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, −7, 1, 1}, {1,7, 1, −7, −7, −7}, {1, 7, 1, −5, 1, 1}, {1, 7, 1, −5, −5, 1}, {1, 7, 1,−5, −3, 1}, {1, 7, 1, −5, −1, 1}, {1, 7, 1, −5, −1, −1}, {1, 7, 1, −1,5, 7}, {1, 7, 3, 1, 5, −3}, {1, 7, 3, 1, −5, −5}, {1, 7, 3, 5, −5, −7},{1, 7, 3, −7, 7, −1}, {1, 7, 3, −7, −5, 3}, {1, 7, 3, −5, −7, −1}, {1,7, 3, −3, −5, 1}, {1, 7, 3, −3, −5, −1}, {1, 7, 3, −3, −3, −3}, {1, 7,3, −1, −5, −3}, {1, 7, 5, 1, −5, −5}, {1, 7, 5, 1, −5, −3}, {1, 7, 5,−5, 3, −1}, {1, 7, 5, −5, −3, −7}, {1, 7, 5, −3, −7, 1}, {1, 7, 5, −1,−5, −5}, {1, 7, 5, −1, −5, −3}, {1, −7, 1, −5, 1, 1}, {1, −7, 3, 3, −5,−5}, {1, −7, 3, 5, −1, −3}, {1, −7, 3, −5, 1, 1}, {1, −7, 3, −5, −5, 1},{1, −7, 3, −5, −5, −5}, {1, −7, 5, −3, −5, 1}, {1, −5, 1, 1, 3, 7}, {1,−5, 1, 1, 5, 7}, {1, −5, 1, 1, 7, 7}, {1, −5, 1, 3, 3, 7}, {1, −5, 1, 7,5, −1}, {1, −5, 1, 7, 7, 1}, {1, −5, 1, −7, −7, 1}, {1, −5, 1, −7, −7,−7}, {1, −5, 3, −7, −7, 1}, {1, −5, 5, 3, −5, −3}, {1, −5, 5, 3, −5,−1}, {1, −5, 5, 5, −5, −3}, {1, −5, 5, 5, −5, −1}, {1, −5, 5, 7, −5, 1},{1, −5, 5, 7, −5, 3}, {1, −5, 5, −7, −5, 1}, {1, −5, 5, −7, −5, 3}, {1,−5, 7, 3, 5, −3}, {1, −5, −7, 3, 5, −3}, {1, −5, −7, 3, 5, −1}, {1, −5,−7, 3, 7, −1}, {1, −3, 1, 1, 3, 7}, {1, −3, 1, 1, 5, 7}, {1, −3, 1, 1,5, −1}, {1, −3, 13, 3, 7}, {1, −3, 1, 3, −7, 7}, {1, −3, 1, 5, 7, 1},{1, −3, 1, 5, 7, 3}, {1, −3, 1, 5, 7, 7}, {1, −3, 1, 5, −7, 3}, {1, −3,1, 7, −5, 5}, {1, −3, 1, 7, −1, 3}, {1, −3, 1, −7, 3, −1}, {1, −3, 1,−7, 7, −1}, {1, −3, 1, −7, −5, 5}, {1, −3, 1, −7, −3, 3}, {1, −3, 1, −5,7, −1}, {1, −3, 3, 3, −7, 7}, {1, −3, 3, 5, −5, −7}, {1, −3, 3, 7, 7,7}, {1, −3, 3, 7, −7, 5}, {1, −3, 3, −7, −7, 3}, {1, −3, 3, −5, −7, −1},{1, −3, 7, −5, 3, 5}, {1, −1, 1, 7, 3, −7}, {1, −1, 1, 7, 3, −5}, {1,−1, 1, −5, 5, −7}, {1, −1, 3, −7, −5, 7}, {1, −1, 5, −7, −5, 5}, {1, −1,5, −7, −5, 7}, {1, −1, 5, −5, −5, 5}, or {1, −1, 5, −5, −5, 7} (wherethese sequences are denoted as a sequence set G for ease of subsequentdescription), where a largest PAPR value of this group of sequences islower than 2.41, and an auto-correlation of the sequences is lower than0.236, thereby ensuring transmission performance and demodulationperformance of the DMRS; or

{1, 1, 5, −7, 3, 7}, {1, 1, 5, −7, 3, −3}, {1, 1, 5, −1, 3, 7}, {1, 1,5, −1, −7, −3}, {1, 3, 1, 7, −1, −7}, {1, 3, 1, −7, 1, −5}, {1, 3, 1,−7, 3, −5}, {1, 3, 1, −7, −1, −7}, {1, 3, 1, −5, 1, −7}, {1, 3, 1, −5,3, −7}, {1, 3, 5, −7, 3, 7}, {1, 3, 5, −1, 3, 7}, {1, 3, 5, −1, 3, −3},{1, 3, 5, −1, −5, 7}, {1, 3, 7, 1, 5, 7}, {1, 3, 7, −7, 3, 7}, {1, 3, 7,−5, 5, 7}, {1, 5, 1, 1, 5, −7}, {1, 5, 1, 1, 5, −3}, {1, 5, 1, 5, 5,−7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1,5, 1, 5, −3, 1}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 5, −1, 3}, {1, 5, 1, 7,−3, −5}, {1, 5, 1, −7, 1, −3}, {1, 5, 1, −7, −3, 5}, {1, 5, 1, −5, 5,7}, {1, 5, 1, −5, −3, 7}, {1, 5, 1, −3, 1, −7}, {1, 5, 1, −3, 5, −7},{1, 5, 1, −3, 7, −7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1,5, 3, 1, 5, −7}, {1, 5, 3, 1, 5, −3}, {1, 5, 3, 7, −3, −5}, {1, 5, 3, 7,−1, 3}, {1, 5, 3, −7, −3, 7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −1, −5,−3}, {1, 5, 5, −1, 3, 7}, {1, 5, 5, −1, 3, −3}, {1, 5, 7, 1, 3, −3}, {1,5, −7, −3, 7, 7}, {1, 7, 1, 1, 3, −5}, {1, 7, 1, 1, −7, −5}, {1, 7, 1,1, −1, −7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −5,−5}, {1, 7, 1, 3, −1, −5}, {1, 7, 1, 5, −1, −3}, {1, 7, 1, 7, −7, −7},{1, 7, 1, 7, −1, −1}, {1, 7, 1, −7, 1, −1}, {1, 7, 1, −7, −5, −5}, {1,7, 1, −7, −1, 1}, {1, 7, 1, −7, −1, −1}, {1, 7, 1, −5, −7, 1}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −5, −5, 3}, {1, 7, 1, −5, −1, 3}, {1, 7, 1, −5,−1, −3}, {1, 7, 1, −3, −7, −5}, {1, 7, 1, −3, −7, −1}, {1, 7, 1, −3, −1,5}, {1, 7, 1, −1, 1, −7}, {1, 7, 1, −1, 7, −7}, {1, 7, 1, −1, −7, −3},{1, 7, 3, 1, 7, −5}, {1, 7, 3, 1, 7, −3}, {1, 7, 3, 5, −1, −5}, {1, 7,3, −7, 7, −3}, {1, 7, 3, −7, −3, 3}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, −7, −5}, {1, 7, 3, −3, −7, −1}, {1, 7, 3, −3, −1, −5}, {1, 7, 3, −1,−7, −5}, {1, 7, 5, −1, 3, −3}, {1, 7, 5, −1, −7, −7}, {1, 7, 5, −1, −7,−3}, {1, −7, 1, 3, −3, 3}, {1, −7, 1, −7, 1, 1}, {1, −7, 3, 1, 7, −1},{1, −7, 3, 1, −7, −5}, {1, −7, 3, 1, −7, −1}, {1, −7, 3, 3, −3, −5}, {1,−7, 3, 5, −3, −5}, {1, −7, 3, −5, −7, −1}, {1, −7, 3, −5, −3, 3}, {1,−7, 3, −3, −3, 3}, {1, −7, 5, 1, −7, −3}, {1, −5, 1, 1, 3, −7}, {1, −5,1, 1, −7, 7}, {1, −5, 1, 3, 3, −7}, {1, −5, 1, 3, −7, 5}, {1, −5, 1, 5,3, 7}, {1, −5, 1, 5, 3, −3}, {1, −5, 1, 5, −7, 3}, {1, −5, 1, 5, −7, 7},{1, −5, 1, 7, 3, −1}, {1, −5, 1, 7, 5, −1}, {1, −5, 1, 7, 7, −7}, {1,−5, 1, 7, 7, −1}, {1, −5, 1, 7, −7, 1}, {1, −5, 1, 7, −7, 5}, {1, −5, 1,7, −1, 1}, {1, −5, 1, −7, 3, 1}, {1, −5, 1, −7, 7, −7}, {1, −5, 1, −7,7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −7, −5, 3}, {1, −5, 1, −3, 3,5}, {1, −5, 1, −1, 3, 7}, {1, −5, 1, −1, 7, 7}, {1, −5, 3, 1, 7, 7}, {1,−5, 3, 5, −5, 3}, {1, −5, 3, 5, −3, 3}, {1, −5, 3, −7, 7, 1}, {1, −5, 3,−7, 7, −1}, {1, −5, 3, −7, −5, 3}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1,−5, −3}, {1, −5, 5, 3, −7, 1}, {1, −5, 5, 3, −7, −3}, {1, −5, 5, 7, 3,−3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −1, 3, 5}, {1, −5, 7, 1, 3, −3},{1, −5, 7, 1, 3, −1}, {1, −5, 7, 1, 5, −1}, {1, −5, −7, 3, 3, −3}, {1,−5, −7, 3, 7, 1}, {1, −5, −7, 3, 7, −3}, {1, −3, 1, 5, −3, 1}, {1, −3,1, 7, 5, −5}, {1, −3, 1, 7, −5, 5}, {1, −3, 1, −7, −5, 5}, {1, −3, 1,−7, −3, 1}, {1, −3, 1, −7, −3, 5}, {1, −3, 1, −5, −3, 7}, {1, −3, 3, 7,−3, 3}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −5, 7}, {1, −3, 3, −7, −3,3}, {1, −1, 1, 7, −1, −7}, {1, −1, 1, −7, 3, −5}, {1, −1, 1, −7, −1, 7},{1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, −5}, or {1, −1, 5, −7, 3, 7}(where these sequences are denoted as a sequence set H for ease ofsubsequent description), where a largest PAPR value of this group ofsequences is lower than 2.11, and an auto-correlation of the sequencesis lower than 0.334, thereby ensuring transmission performance anddemodulation performance of the DMRS.

Optionally, when delta=1, the method further includes:

determining the first sequence based on the preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

a third sequence set, including: {1, 1, 5, −5, 3, −3}, {1, 1, 7, −5, 7,−1}, {1, 1, 7, −1, 3, −1}, {1, 1, −5, 3, −1, 3}, {1, 1, −5, 7, −5, 3},{1, 1, −3, 7, −1, 5}, {1, 3, 7, −5, 3, −3}, {1, 3, −1, −7, 1, 5}, {1, 5,1, −7, 3, 3}, {1, 5, 1, −5, −5, 1}, {1, 5, 3, −1, −5, 3}, {1, 5, 5, 1,−5, 3}, {1, 5, 7, 3, −3, 5}, {1, 5, −7, 1, −5, 7}, {1, 5, −7, −5, 7, 1},{1, 5, −5, 3, −3, −7}, {1, 5, −5, 3, −1, −5}, {1, 5, −5, −5, 5, −3}, {1,5, −3, 3, 3, −3}, {1, 5, −3, 7, 3, 5}, {1, 7, 7, 1, −7, 5}, {1, 7, 7, 1,−3, 1}, {1, 7, −5, 7, −1, −7}, {1, 7, −5, −7, 5, 1}, {1, 7, −5, −5, 7,1}, {1, 7, −1, 3, −1, −7}, {1, 7, −1, −7, 5, 5}, {1, 7, −1, −5, 7, 5},{1, −7, 3, 3, −7, −3}, {1, −7, 3, −1, 1, 5}, {1, −7, 5, 1, −1, 3}, {1,−7, 5, −7, −1, −1}, {1, −7, −3, 1, 3, −1}, {1, −7, −3, −7, 3, 3}, {1,−7, −1, 3, 3, −1}, {1, −7, −1, −1, −7, 5}, {1, −5, 3, 7, −5, −3}, {1,−5, 3, −1, 3, −7}, {1, −5, 7, 7, −5, 1}, {1, −5, 7, −7, −3, 1}, {1, −5,7, −5, 3, −7}, {1, −5, −5, 1, 5, 1}, {1, −5, −5, 1, −7, −3}, {1, −3, 1,7, 7, 1}, {1, −3, 1, −7, −1, −1}, {1, −3, 5, −5, −1, −3}, {1, −3, 5, −1,−1, 5}, {1, −3, 7, 7, −3, 5}, {1, −3, 7, −1, 3, 7}, {1, −3, 7, −1, 5,−7}, {1, −3, −7, 1, 7, −5}, {1, −3, −7, 7, −5, 1}, {1, −3, −3, 1, 7,−1}, {1, −3, −1, 3, 7, −1}, {1, −1, 3, −7, 1, −3}, and {1, −1, −5, 7,−1, 5};

a fourth sequence set, including: {1, 3, 7, −5, 1, −3}, {1, 3, −7, 5, 1,5}, {1, 3, −7, −3, 1, −3}, {1, 3, −1, −5, 1, 5}, {1, 5, 1, −3, 3, 5},{1, 5, 1, −3, 7, 5}, {1, 5, 1, −3, −5, 5}, {1, 5, 1, −3, −1, 5}, {1, 5,3, −3, −7, 5}, {1, 5, 7, 3, −1, 5}, {1, 5, 7, −3, −7, 5}, {1, 5, −7, 3,1, −3}, {1, 5, −7, 5, 1, 7}, {1, 5, −7, 7, 3, −1}, {1, 5, −7, −5, 1,−3}, {1, 5, −7, −1, 1, −3}, {1, 5, −5, 7, 3, 5}, {1, 5, −5, −3, −7, 5},{1, 5, −1, −5, 7, 5}, {1, 5, −1, −3, −7, 5}, {1, 7, 3, −1, 3, 7}, {1, 7,−7, 5, 1, 5}, {1, 7, −7, −3, 1, −3}, {1, 7, −5, −1, 1, −3}, {1, −5, 7,3, 1, 5}, {1, −5, −7, 5, 1, 5}, {1, −3, 1, 5, 7, −3}, {1, −3, 1, 5, −5,−3}, {1, −3, 3, 5, −7, −3}, {1, −3, −7, 3, 1, 5}, {1, −3, −7, 7, 1, 5},{1, −3, −7, −5, 1, 5}, {1, −3, −7, −3, 1, −1}, {1, −3, −7, −1, 1, 5},{1, −3, −5, 5, −7, −3}, {1, −3, −1, 3, 7, −3}, {1, −3, −1, 5, −7, −3},{1, −1, 3, 7, 3, −1}, {1, −1, −7, 5, 1, 5}, and {1, −1, −5, 7, 1, 5};

a fifth sequence set, including: {1, 3, −3, 1, 3, −3}, {1, 3, −3, 1, −5,−1}, {1, 3, −3, −7, 3, 7}, {1, 3, −3, −7, −5, 5}, {1, 3, −3, −1, 3, −3},{1, 5, −1, −7, 3, 7}, {1, 7, 3, 1, 5, −1}, {1, 7, 3, 1, 7, 5}, {1, 7, 3,1, −5, −1}, {1, 7, 3, 1, −3, 3}, {1, 7, 3, 5, −7, 3}, {1, 7, 3, 5, −1,3}, {1, 7, 3, 7, 1, 3}, {1, 7, 3, −7, 3, 7}, {1, 7, 3, −7, 5, −5}, {1,7, 3, −7, 7, −3}, {1, 7, 3, −7, −3, 7}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, 1, −5}, {1, 7, 3, −3, 7, −5}, {1, 7, 3, −1, −7, −5}, {1, 7, 5, 1, 7,5}, {1, 7, 5, −7, −1, −3}, {1, 7, 5, −1, −7, −3}, {1, −5, −3, 1, −5,−3}, {1, −5, −3, 7, −5, 5}, {1, −5, −3, −7, 3, 5}, {1, −5, −3, −7, 3,7}, {1, −5, −3, −1, 3, −3}, {1, −3, 3, 1, 3, −3}, {1, −3, 3, 1, 5, −1},{1, −3, 3, 1, −5, −1}, {1, −3, 3, 5, −7, 3}, {1, −3, 3, 5, −1, 3}, {1,−3, 3, 7, −3, −5}, {1, −3, 3, −7, 3, 7}, {1, −3, 3, −7, −5, 5}, {1, −3,3, −7, −3, 7}, {1, −3, 3, −3, 7, −5}, {1, −3, 3, −1, 5, 3}, {1, −1, 5,1, −1, 5}, {1, −1, 5, −7, 7, −3}, and {1, −1, 5, −7, −3, 7};

a sixth sequence set, including: {1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1,7}, {1, 1, 3, −5, 5, −1}, {1, 1, 3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1,3, 1, −7, 3, −5}, {1, 3, 1, −5, 3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1,−5, 5, −1}, {1, 3, 3, −3, 5, −5}, {1, 3, 3, −3, 7, −1}, {1, 3, 5, 1, −5,5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5, 7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1,3, 5, −1, −7, 7}, {1, 3, 5, −1, −7, −3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1,3, −5, −7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7,−7}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1,5, 1, 7, 5, −3}, {1, 5, 1, −7, 5, −3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1,−3, 3, −3}, {1, 5, 1, −3, 5, −3}, {1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7,7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −3, −3, 7}, {1, 5, 3, −1, 7, −5},{1, 5, 3, −1, −7, −3}, {1, 5, 5, 1, −5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7,1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5,−7, 7}, {1, 7, 1, 7, 7, −1}, {1, 7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5},{1, 7, 1, −7, −5, 3}, {1, 7, 1, −5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7,1, −3, 3, −1}, {1, 7, 1, −1, 3, 7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5,−3, 3}, {1, −7, 1, 1, 5, 7}, {1, −7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7},{1, −7, 1, 3, −7, 7}, {1, −7, 1, 3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1,−7, 1, 7, 5, −1}, {1, −7, 1, −5, −7, −5}, {1, −7, 1, −5, −7, −1}, {1,−7, 1, −5, −5, 1}, {1, −7, 1, −5, −5, −3}, {1, −7, 1, −5, −5, −1}, {1,−7, 1, −5, −3, 1}, {1, −7, 1, −5, −3, 3}, {1, −7, 1, −3, −7, −3}, {1,−7, 1, −1, 5, 7}, {1, −7, 3, 3, −7, −5}, {1, −7, 3, 3, −5, −5}, {1, −7,3, 5, −5, −5}, {1, −7, 3, 5, −3, 3}, {1, −7, 3, 5, −3, −5}, {1, −7, 3,5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1, −7, 3, −5, −3, −1}, {1, −7, 3, −1,−5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5, 1, 3, −1, 5}, {1, −5, 1, 5, −7,7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1, −7, 7, −1}, {1, −5, 1, −7, −7,−1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1, −3, −1, 5}, {1, −5, 1, −1, 7,−7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1, 7, −1}, {1, −5, 3, 5, 7, −1},{1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7, 5}, {1, −5, 3, −7, 7, −1}, {1,−5, 3, −7, −7, 1}, {1, −5, 3, −7, −7, −1}, {1, −5, 3, −7, −5, 1}, {1,−5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3}, {1, −5, 5, 7, −5, −3}, {1, −5,5, −7, −5, 5}, {1, −5, 5, −7, −5, −1}, {1, −5, 5, −1, 3, 5}, {1, −3, 1,5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1, −3, 1, 7, −5, −7}, {1, −3, 1, 7,−3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3, 3, 1, 7, −1}, {1, −1, 1, 3, −3,7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7, −1, −7}, {1, −1, 3, 7, −5, 5},{1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, 7}, and{1, −1, 3, −3, −3, 7};

a seventh sequence set, including: {1, 1, 3, 5, −3, 7}, {1, 1, 3, −7,−1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1, 3, −3, 7, −1}, {1, 1, 5, 7, −5, 5},{1, 3, 1, −7, 3, −5}, {1, 3, 1, −5, 3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3,1, −5, 5, −1}, {13, 3, −3, 5, −5}, {13, 3, −3, 7, −1}, {1, 3, 5, 1, −5,5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5, 7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1,3, 5, −1, −7, 7}, {1, 3, 5, −1, −7, −3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1,3, −5, −7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7,−7}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1,5, 1, 7, 5, −3}, {1, 5, 1, −7, 5, −3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1,−3, 3, −3}, {1, 5, 1, −3, 5, −3}, {1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7,7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −3, −3, 7}, {1, 5, 3, −1, 7, −5},{1, 5, 3, −1, −7, −3}, {1, 5, 5, 1, −5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7,1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5,−7, 7}, {1, 7, 1, 7, 7, −1}, {1, 7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5},{1, 7, 1, −7, −5, 3}, {1, 7, 1, −5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7,1, −3, 3, −1}, {1, 7, 1, −1, 3, 7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5,−3, 3}, {1, −7, 1, 1, 5, 7}, {1, −7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7},{1, −7, 1, 3, −7, 7}, {1, −7, 1, 3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1,−7, 1, 7, 5, −1}, {1, −7, 1, −5, −7, −5}, {1, −7, 1, −5, −7, −1}, {1,−7, 1, −5, −5, 1}, {1, −7, 1, −5, −5, −3}, {1, −7, 1, −5, −5, −1}, {1,−7, 1, −5, −3, 1}, {1, −7, 1, −5, −3, 3}, {1, −7, 1, −3, −7, −3}, {1,−7, 1, −1, 5, 7}, {1, −7, 3, 3, −7, −5}, {1, −7, 3, 3, −5, −5}, {1, −7,3, 5, −5, −5}, {1, −7, 3, 5, −3, 3}, {1, −7, 3, 5, −3, −5}, {1, −7, 3,5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1, −7, 3, −5, −3, −1}, {1, −7, 3, −1,−5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5, 1, 3, −1, 5}, {1, −5, 1, 5, −7,7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1, −7, 7, −1}, {1, −5, 1, −7, −7,−1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1, −3, −1, 5}, {1, −5, 1, −1, 7,−7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1, 7, −1}, {1, −5, 3, 5, 7, −1},{1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7, 5}, {1, −5, 3, −7, 7, −1}, {1,−5, 3, −7, −7, 1}, {1, −5, 3, −7, −7, −1}, {1, −5, 3, −7, −5, 1}, {1,−5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3}, {1, −5, 5, 7, −5, −3}, {1, −5,5, −7, −5, 5}, {1, −5, 5, −7, −5, −1}, {1, −5, 5, −1, 3, 5}, {1, −3, 1,5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1, −3, 1, 7, −5, −7}, {1, −3, 1, 7,−3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3, 3, 1, 7, −1}, {1, −1, 1, 3, −3,7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7, −1, −7}, {1, −1, 3, 7, −5, 5},{1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, 7}, and{1, −1, 3, −3, −3, 7}; or

an eighth sequence set, including: {1, 1, −7, 5, −1, 1}, {1, 1, −7, 7,−3, 1}, {1, 1, −7, −5, 5, 1}, {1, 1, −7, −3, 3, 1}, {1, 1, −7, −3, −5,1}, {1, 1, −7, −1, −3, 1}, {1, 3, 7, 1, 5, 1}, {1, 3, −5, 3, 5, 1}, {1,3, −5, 3, 5, −3}, {1, 3, −5, 7, −7, 1}, {1, 3, −5, 7, −5, 5}, {1, 3, −5,7, −1, 1}, {1, 3, −5, −5, 3, −1}, {1, 3, −5, −3, 5, 1}, {1, 3, −3, 1,−5, −1}, {1, 3, −3, −7, 1, 1}, {1, 3, −1, 7, −7, 1}, {1, 5, 1, −7, −5,−1}, {1, 5, 3, −7, 1, 1}, {1, 5, 7, −1, −5, −1}, {1, 5, −5, −7, 1, 1},{1, 5, −3, −5, 3, 1}, {1, 5, −1, 3, 5, −3}, {1, 5, −1, 3, −3, −1}, {1,5, −1, 3, −1, 7}, {1, 7, 5, −7, 1, 1}, {1, 7, 5, −3, −3, 5}, {1, 7, −5,3, 3, −5}, {1, −7, 1, 3, −5, 7}, {1, −7, 1, 3, −1, 7}, {1, −7, 5, 7, −1,7}, {1, −7, 5, −7, 3, 7}, {1, −7, 5, −3, −1, 7}, {1, −7, 5, −1, 1, −7},{1, −7, 7, −3, 1, −7}, {1, −7, 7, −1, 3, −5}, {1, −7, 7, −1, −3, 5}, {1,−7, −7, 1, 3, −3}, {1, −7, −7, 1, 5, −5}, {1, −7, −7, 1, 7, 5}, {1, −7,−7, 1, −3, 7}, {1, −7, −7, 1, −1, 5}, {1, −7, −5, 3, 5, −3}, {1, −7, −5,3, −5, −3}, {1, −7, −5, 3, −1, 1}, {1, −7, −5, 3, −1, 7}, {1, −7, −5, 5,1, −7}, {1, −7, −5, 7, −1, 1}, {1, −7, −5, −1, −7, −3}, {1, −7, −3, 3,1, −7}, {1, −7, −3, 5, 3, −5}, {1, −7, −3, −5, 1, −7}, {1, −7, −1, −3,1, −7}, {1, −5, 7, −1, −1, 7}, {1, −5, −3, 5, 5, −3}, {1, −5, −3, 7, −5,5}, {1, −5, −1, −7, −5, 5}, {1, −5, −1, −7, −3, 7}, {1, −5, −1, −5, 3,5}, {1, −3, 1, −5, −1, 1}, {1, −3, 5, 5, −3, −1}, {1, −3, 5, 7, −1, 1},{1, −3, 5, 7, −1, 7}, {1, −3, 7, −7, 1, 1}, {1, −3, −1, 7, −1, 1}, {1,−1, 3, −5, −5, 3}, {1, −1, 5, −7, 1, 1}, {1, −1, 5, −3, −3, 5}, {1, −1,7, 5, −3, 1}, {1, −1, 7, 7, −1, 3}, and {1, −1, 7, −5, 3, 1}.

Optionally, when delta=1, the method further includes:

determining the first sequence based on the preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 5, 1, −5, 3, 3}, {1, −5, 1, 3, −3, 7}, {1, 7, 1, 7, −3, −5}, {1, 5,5, −5, 3, −1}, {1, 7, 1, 1, −3, 5}, {1, 7, 1, −1, 5, −5}, {1, 7, 1, −5,−3, −1}, {1, −1, 5, −7, −1, −1}, {1, 7, 1, −5, −3, 7}, {1, −3, 1, 1, −5,3}, {1, 1, 7, −7, 3, −1}, {1, 5, 1, 1, 7, −1}, {1, −5, 1, 7, 5, −5}, {1,−5, 1, 7, −3, −5}, {1, 7, 3, −1, 5, 5}, {1, 5, 1, 3, −1, 5}, {1, −3, 1,−5, 3, −7}, {1, −7, 5, −1, 3, −7}, {1, 5, 1, 7, −1, −7}, {1, 5, 1, −5,−5, 3}, {1, −5, 1, −1, 5, −5}, {1, −5, 1, 3, −3, −1}, {1, −3, 1, 5, −1,−5}, {1, −3, 1, −1, 3, −3}, {1, 7, 1, −5, 5, 7}, {1, 7, 1, 3, 5, −1},{1, 7, 3, −1, −1, 5}, {1, 7, 1, 7, 5, 3}, {1, 5, 1, −3, 3, 7}, or {1,−5, 3, 7, −3, −3} (where these sequences are denoted as a sequence set Ifor ease of subsequent description); or

{1, −5, 1, 3, −3, −1}, {1, −5, 1, 3, 5, −1}, {1, −5, 3, 7, −3, −3}, {1,−5, 3, −7, −3, −3}, {1, −3, 1, 1, −5, 3}, {1, −3, 1, 7, −1, −1}, {1, −3,1, 7, 7, −1}, {1, −3, 3, 7, −5, −3}, {1, −3, 3, 7, −3, −3}, {1, −3, 3,7, −1, −1}, {1, −3, 5, 5, −5, −1}, {1, −3, 5, −7, −5, −1}, {1, −3, 5,−7, −3, −1}, {1, −3, 5, −7, −1, −1}, {1, −1, 5, −7, −1, −1}, {1, 1, 5,−5, 3, −1}, {1, 1, 5, −1, −5, 3}, {1, 1, 5, −1, −5, 5}, {1, 1, 5, −7, 3,−1}, {1, 1, 7, −7, 3, −1}, {1, 3, 5, −1, −5, 5}, {1, 3, 5, −7, 3, −1},{1, 3, 7, −7, 3, −1}, {1, 5, 1, −5, −5, 3}, {1, 5, 1, −5, 3, 3}, {1, 5,1, −1, −5, 5}, {1, 5, 1, 1, 7, −1}, {1, 5, 1, 3, −1, 5}, {1, 5, 3, −1,−5, 5}, {1, 5, 5, −5, 3, −1}, {1, 5, 5, −1, −5, 3}, {1, 5, 5, −1, −5,5}, {1, 7, 1, −5, −3, −1}, {1, 7, 1, −1, −3, 3}, {1, 7, 1, −1, 5, 3},{1, 7, 1, 1, −3, 5}, {1, 7, 1, 3, 5, −1}, {1, 7, 1, 7, 5, 3}, {1, 7, 3,−3, −3, 5}, {1, 7, 3, −1, −1, 5}, {1, 7, 3, −1, 1, 5}, {1, 7, 3, −1, 5,5}, {1, 7, 3, 1, −3, 5}, {1, 7, 3, 1, −1, 5}, {1, 7, 3, 3, −3, 5}, {1,7, 3, 3, −1, 5}, {1, 7, 5, −1, −3, 3}, {1, 7, 5, −1, −1, 5}, {1, 7, 5,1, −3, 5}, {1, 7, 5, 1, −1, 5}, {1, −7, 3, −1, −1, 3}, {1, −7, 3, −1,−1, 5}, {1, −7, 3, 3, −1, 5}, {1, −7, 5, −1, 1, 5}, {1, −7, 5, −1, 3,5}, or {1, −7, 5, 1, −1, 5} (where these sequences are denoted as asequence set J for ease of subsequent description).

Optionally, when delta=0, the method further includes:

determining the first sequence based on the preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{32}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 19, 1, −19, 29, −17}, {1, −17, −1, 17, 17, −9}, {1, 11, −29, 15,−15, 5}, {1, 15, −5, −5, 9, −13}, {1, −19, 19, 29, −13, −21}, {1, 7, 31,−9, −17, 25}, {1, −19, −7, −29, −29, −13}, {1, 19, 7, −25, −9, −21}, {1,−19, −5, 9, −13, 1}, {1, 21, −25, −19, 25, 5}, {1, 19, −11, −25, −9,13}, {1, 11, 31, −13, 31, 25}, {1, −3, −19, −5, −27, −13}, {1, −27, 19,−23, 31, −11}, {1, 25, 17, −7, −27, −5}, {1, 27, 3, −7, 3, −19}, {1, 21,−3, 9, 3, −21}, {1, −17, −9, 7, 25, 21}, {1, 19, −29, 17, −29, 29}, {1,−11, 3, −5, 9, 23}, {1, 9, −13, 27, 17, −27}, {1, −7, 13, −19, 25, −3},{1, 19, −27, 5, 23, 11}, {1, 11, −11, −11, −31, −15}, {1, 15, 5, 19, −3,−13}, {1, 23, 9, −17, 3, −11}, {1, −7, 31, 9, −29, −7}, {1, 25, −17, 25,−31, 5}, {1, 17, 1, −13, −25, −9}, or {1, −19, 3, 29, 23, −7}(wherethese sequences are denoted as a sequence set K for ease of subsequentdescription).

Optionally, when delta=1, the method further includes:

determining the first sequence based on the preset condition and asequence {s_(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{32}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, −23, 21, −1, −3, 17}, {1, 19, −3, −23, −7, −27}, {1, −17, −13, 29,−3, 17}, {1, −21, 5, 25, 17, −21}, {1, 23, −19, −19, −29, −7}, {1, −11,13, 11, −31, −9}, {1, 7, −17, 5, 15, −9}, {1, 1, 11, −11, 13, −9}, {1,23, −1, −11, 15, −27}, {1, 23, 27, 7, 27, −17}, {1, −19, −27, −7, 11,−31}, {1, −3, −23, 21, −23, 21}, {1, 29, 9, 17, −1, 11}, {1, 27, 29, 5,−15, 23}, {1, −5, 17, −21, −29, 11}, {1, −17, −13, 9, −7, 11}, {1, −3,−25, −9, −27, 15}, {1, −19, 1, −11, −7, 13}, {1, 17, −27, 13, 9, −13},{1, −17, −11, 11, 31, −17}, {1, 19, 13, −9, −29, 19}, {1, −21, 31, −15,−23, −3}, {1, −21, −19, 19, 31, −9}, {1, 23, 31, 5, 15, −5}, {1, −23,17, 21, −19, 23}, {1, 21, 27, −15, −29, 17}, {1, 23, 23, 11, −29, −7},{1, −25, −3, −1, 13, −9}, {1, 21, −23, −21, 23, −21}, or {1, 21, 11, 31,11, 13} (where these sequences are denoted as a sequence set L for easeof subsequent description).

Optionally, when delta=1, the method further includes:

determining the first sequence based on the preset condition and thesequence {s(n)}, where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{16}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, 3, −11, 9, −5, −3}, {1, 9, −15, 13, 3, 11}, {1, −9, −13, −5, 3, −7},{1, −13, −15, 5, −9, −3}, {1, −13, 7, 5, −9, −3}, {1, −11, 7, 11, 9,15}, {1, −11, −1, 5, 15, 7}, {1, 11, 5, −7, −15, −5}, {1, 11, −1, −9,−15, −5}, {1, −11, 13, −9, −1, −7}, {1, 11, 3, −9, −1, −7}, {1, 9, −3,−11, −1, −7}, {1, −11, −3, 5, −1, 9}, {1, 9, −1, −5, −13, −5}, {1, −13,5, 5, 11, −3}, {1, −13, −9, 9, 15, 15}, {1, −9, 9, 5, 11, 15}, {1, 3, 3,−11, 7, 15}, {1, 5, 11, 7, −7, 15}, {1, 9, −5, 13, 13, 15}, {1, −11, −1,7, −3, 5}, {1, 9, −13, 7, 3, 11}, {1, 9, −15, 15, 5, −7}, {1, 11, 3,−11, −13, −5}, {1, −1, −15, −9, 9, −5}, {1, −13, −15, −9, 9, −5}, {1,−11, −5, 13, −1, −5}, {1, −13, 5, 11, −1, 5}, {1, −13, 5, −9, −1, 3}, or{1, −13, 5, −9, −11, −7} (where these sequences are denoted as asequence set M for ease of subsequent description); or

{1, 3, −11, 9, −5, −3}, {1, 3, 7, −7, 13, −1}, {1, −13, −9, −7, −5, 13},{1, −11, 7, 11, 11, 15}, {1, −11, 7, 11, 15, 15}, {1, 1, 5, 9, −5, 15},{1, −13, −13, −11, −5, 13}, {1, 7, −7, 13, −1, 1}, {1, −11, 7, 13, 13,15}, {1, −13, −11, −5, −5, 13}, {1, 3, −11, 9, −5, −5}, {1, −11, 7, 13,15, 15}, {1, −11, −15, −7, 1, −7}, {1, 5, −9, 11, −3, −5}, {1, −13, −15,−11, −5, 13}, {1, −13, −15, 5, −9, −3}, {1, −13, 7, 5, −9, −3}, {1, 5,3, −11, 9, −5}, {1, −11, 7, 11, −15, 3}, {1, −7, 1, 9, 5, −7}, {1, 5,11, 9, −5, 15}, {1, −11, 7, 11, 9, 15}, {1, −13, 7, −7, −1, −3}, {1,−13, 7, 5, −9, −5}, {1, −11, −1, 5, 15, 7}, {1, 11, 5, −7, −15, −5}, {1,11, 3, −9, −15, −5}, {1, 11, −1, −9, −15, −5}, {1, −15, −9, −7, −5, 13},{1, 3, 9, 11, −5, 15}, {1, 11, −1, −7, −15, −5}, {1, 11, 5, −3, −15,−5}, {1, −15, −13, −7, −5, 13}, {1, 3, 5, 11, −5, 15}, {1, −13, −13, −5,−5, 13}, {1, −11, 13, −9, −1, −7}, {1, 11, 5, −3, −15, −7}, {1, 11, 5,−7, −15, −7}, {1, −9, −15, −5, 1, 11}, {1, 11, 3, −9, −1, −7}, {1, 7, 7,11, −3, −15}, {1, −15, −11, −7, −5, 13}, {1, 5, 7, 11, −5, 15}, {1, −11,−3, 5, 15, 7}, {1, −5, −15, −5, 1, 11}, {1, 9, −1, −5, −13, −5}, {1,−11, 5, 11, 15, 15}, {1, 7, 11, −5, 15, 1}, {1, 9, 3, 11, 3, −9}, {1,−7, −11, 11, −13, −7}, {1, 1, 7, −9, 11, −3}, {1, 5, 11, −5, 15, 1}, {1,−13, 13, −9, −3, 7}, {1, −15, −11, −5, −5, 13}, {1, 11, 5, −5, −15, −5},{1, −11, 5, 9, 9, 15}, {1, 7, 7, 11, −5, 15}, {1, 3, 7, 11, −5, 15}, {1,9, 15, −9, −13, 11}, {1, −9, 15, 11, −13, −7}, {1, 9, 1, 9, 3, −9}, {1,11, −1, −7, 1, −7}, {1, −11, 5, 9, 11, 15}, {1, −13, 7, −9, −7, 1}, {1,11, −1, −9, −1, −7}, {1, 9, 11, −5, 15, 1}, {1, −11, 15, 7, −15, −7},{1, 9, 1, −11, 15, −7}, {1, −7, −13, −3, 5, 13}, {1, −7, −15, −5, 1,11}, {1, 11, 3, −5, −15, −5}, {1, 11, 5, −5, −15, −7}, {1, 11, 3, −7,−15, −5}, {1, −9, 1, 9, 3, 11}, {1, −9, −15, −5, 3, 11}, {1, −9, −1, −7,1, 11}, {1, −9, −15, 11, −13, −7}, {1, −5, −11, 11, −13, −7}, {1, −13,5, 5, 11, −3}, {1, −13, −9, 9, 15, 15}, {1, −13, 5, 11, −3, 1}, {1, −13,−13, −9, 9, 15}, {1, −11, −13, 9, −15, −9}, {1, −11, −13, 9, −13, −7},{1, 7, 15, 5, 3, −9}, {1, −11, −13, −5, 1, 11}, {1, 3, −11, 9, −5, −7},{1, 9, 7, −5, −15, −5}, {1, 11, −1, −11, −13, −5}, {1, −11, −1, 5, 13,11}, {1, −13, 7, −7, −5, 3}, {1, −1, −13, −5, 1, 11}, {1, −3, −15, −5,1, 11}, {1, 11, 7, −5, −15, −5}, {1, 11, 7, −3, −15, −5}, {1, −15, −9,−11, −5, 11}, {1, −13, −7, −11, −7, 11}, {1, 11, −1, −11, −15, −5}, {1,3, −11, −3, −3, 15}, {1, 11, −1, −5, −15, −5}, {1, 9, −1, −11, −13, −5},{1, −11, −15, −5, 1, 11}, {1, 3, 3, −11, 7, 15}, {1, 9, 3, 11, −3, −9},{1, −9, 13, −11, −13, −7}, {1, 9, 15, −9, 13, 11}, {1, −9, −1, 5, 13,11}, {1, −5, 3, 11, −11, 15}, {1, −13, 9, −5, −1, −5}, {1, 9, −13, 13,−1, 7}, {1, −1, 7, −3, −13, −5}, {1, 3, −11, 7, 7, 15}, {1, 9, −5, 13,13, 15}, {1, −13, 13, −9, −1, 7}, {1, 11, 7, −7, −15, −5}, {1, 11, 3,−11, −15, −5}, {1, −11, −3, 5, 15, 5}, {1, −11, −1, 7, −3, 5}, {1, −11,−1, −11, −3, 5}, {1, 11, 1, −11, −3, −7}, {1, 11, −1, −11, −3, −7}, {1,11, −1, −11, −15, −7}, {1, 11, −1, −5, −15, −7}, {1, −11, −1, −5, 3,11}, {1, 11, −1, −5, 3, 11}, {1, −11, −15, −5, 3, 11}, {1, −11, −3, 5,15, 11}, {1, 9, −13, 7, 3, 11}, {1, −11, −3, 5, 1, 11}, {1, −3, 7, −5,−15, −7}, {1, 9, −13, 15, 3, −7}, {1, −11, −1, 7, 3, 11}, {1, −11, −15,−7, 1, 11}, {1, −11, −1, 7, 15, 5}, {1, −11, −1, 7, 15, 11}, {1, 11,−13, −5, 15, 11}, {1, −9, 1, −3, 5, 13}, {1, −9, 1, 9, −15, 13}, {1, 9,−3, −13, −3, 5}, {1, −9, −13, −3, 5, 13}, {1, −11, −5, −9, −3, 13}, {1,7, 13, 9, −3, −15}, {1, −11, 5, 11, 7, 13}, {1, −11, −15, −9, −3, 13},{1, 9, −15, 15, 3, 11}, {1, 9, −15, 15, 5, −7}, {1, 9, −15, 15, −9, 13},{1, 9, −1, 7, −5, −7}, {1, −11, −13, −5, 3, 11}, {1, −1, −11, −3, −15,−7}, {1, −1, 7, 15, 3, 11}, {1, 9, −15, 15, 3, −7}, {1, −11, −3, −5, 3,11}, {1, −1, 7, −5, −15, −7}, {1, −1, 7, 15, 3, −7}, {1, 9, −15, −7, 13,3}, {1, −11, 5, 11, 9, 15}, {1, 7, 13, 11, −3, −15}, {1, −1, 5, 11, −3,−15}, {1, 7, 5, −11, 9, −5}, {1, 7, 5, 11, −5, 15}, {1, −15, 5, −9, −11,−5}, {1, −11, 5, 9, 7, 15}, {1, −11, −13, 11, −13, −7}, {1, 9, −13, 15,1, −7}, {1, −11, 7, 11, 7, 13}, {1, 11, 3, −11, −3, −7}, {1, 11, 3, −11,−15, −7}, {1, −7, 3, 11, −13, 15}, {1, 11, 3, −11, −3, 5}, {1, −11, 5,13, 11, 15}, {1, 5, −11, −13, 5, −7}, {1, −1, 7, 13, −11, 13}, {1, 5,13, 11, −3, −15}, {1, −3, −15, 3, 7, 13}, {1, −1, −13, 3, 7, 15}, {1, 9,−7, 13, −1, 3}, {1, −7, 1, −13, 15, −7}, {1, 9, −13, 15, 1, 9}, {1, −13,7, −5, 1, −3}, {1, −1, 7, 11, −3, −15}, {1, −7, 3, 11, 7, 15}, {1, −11,7, 13, 9, 13}, {1, 9, 1, −13, 15, −7}, {1, −11, −15, −9, −5, 13}, {1, 9,7, −9, 11, −3}, {1, −11, 7, 3, 9, 13}, {1, 9, 13, −3, −15, 15}, {1, −1,−13, 11, −13, −7}, {1, −15, 5, −9, −11, −3}, {1, −1, 3, −13, 7, −7}, {1,9, −5, −13, −3, −7}, {1, 5, −9, 11, 7, −5}, {1, 9, 1, −1, −13, −5}, {1,5, 1, 7, −7, 13}, {1, −11, 7, 11, −15, 13}, {1, 5, 1, −11, 9, −5}, {1,−13, 7, −5, −9, −5}, {1, −13, 7, −5, −1, 5}, {1, 9, −3, 15, 13, −3}, {1,11, 3, −11, −13, −5}, {1, −7, 3, 9, −15, 15}, {1, −11, −15, −7, −3, 13},{1, 5, 13, 9, −3, −15}, {1, −13, −15, −9, 9, 15}, {1, −1, 5, 11, −3,15}, {1, −13, 5, 3, −11, −5}, {1, −1, −15, −9, 9, −5}, {1, −13, 5, 11,−3, 3}, {1, 7, 13, 11, −3, 15}, {1, −13, −7, −1, −15, 15}, {1, −13, −15,−9, 9, −5}, {1, 7, −5, 13, −13, 15}, {1, −3, 15, 3, −11, −5}, {1, −13,−7, −11, 7, −5}, {1, −11, −5, 13, −1, −5}, {1, −13, 5, 11, −1, 5}, {1,7, −7, 13, −13, 5}, {1, −11, −5, 1, −3, 15}, {1, −11, 7, −7, −11, −5},{1, −13, −7, −11, −5, 13}, {1, −3, 3, 9, −5, 15}, {1, 7, −5, 13, 9, 15},{1, −13, −5, −7, 11, −3}, {1, −13, 5, −9, −11, −3}, {1, −13, 5, 3, −11,−3}, {1, −1, −15, −11, −3, 15}, {1, 9, −5, 13, 11, 15}, {1, 5, −9, 9, 7,15}, {1, 9, −5, −7, 11, −3}, {1, −1, −15, 3, 11, 15}, {1, 5, 13, 11, −3,15}, {1, 5, 3, −11, 7, 15}, {1, −13, 5, −9, −1, 3}, {1, −13, 5, −9, −11,−7}, {1, −13, −5, 13, 11, 15}, {1, 5, 3, −11, −3, 15}, {1, 7, 15, 3, 1,−11}, {1, −11, −3, 3, 15, 3}, {1, 7, 15, 13, 1, −11}, {1, −11, −13, −5,1, 13}, {1, −11, −13, −7, 1, 13}, {1, −11, 1, 9, 15, 13}, {1, 13, 3,−11, −5, −7}, {1, 7, −15, 7, −5, −5}, {1, −13, −15, −5, −3, 13}, {1,−11, 11, −11, −5, 1}, {1, −9, 3, 9, −15, 15}, {1, −13, −15, −9, −1, 11},{1, 3, 13, 11, −3, −15}, {1, −9, 3, 11, −15, 15}, {1, −1, 5, −9, 13,−7}, or {1, 13, 3, −11, −13, −5} (where these sequences are denoted as asequence set N for ease of subsequent description).

Optionally, when delta=1, the method further includes:

determining the first sequence based on the preset condition and thesequence {s(n)} where the preset condition is x_(n)=y_((n+M)mod K),where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, andj=√{square root over (−1)}; and

the sequence {s_(n)} includes at least one of the following sequences:

{1, −7, −7, −3, −1, 7}, {1, 5, 5, −3, 5, 7}, {1, 5, −3, −5, 1, 5}, {1,7, −7, −1, −3, 7}, {1, −1, 1, −5, −3, 7}, {1, 7, 3, −5, −1, −3}, {1, 7,−7, −1, −7, 7}, {1, −5, −3, −5, 5, −1}, {1, 5, 7, 7, −1, 7}, {1, −7, 3,3, −5, −1}, {1, 7, −1, 3, −1, −3}, {1, −1, 1, −7, 3, −3}, {1, 1, −5, 3,5, −7}, {1, −1, 5, 1, −7, −3}, {1, 5, −7, 5, −5, 5}, {1, 5, 1, 1, −5,−1}, {1, 5, −7, 7, 1, 5}, {1, 5, −7, 1, −3, 3}, {1, −5, 3, 3, 7, −1},{1, 3, −5, −1, −1, 7}, {1, −7, −5, −7, −3, 7}, {1, −1, −5, −1, −7, −3},{1, −5, 5, 3, −7, −5}, {1, −7, 3, 7, −1, −1}, {1, −3, 5, 3, −7, −3}, {1,−7, −5, 5, −3, 1}, {1, −5, 5, −5, −1, −1}, {1, 3, −3, 1, −7, 1}, {1, −1,7, 3, 7, −5}, or {1, 1, 5, −3, 7, −7} (where these sequences are denotedas a sequence set O for ease of subsequent description); or

{1, −5, 3, 3, 5, −3}, {1, −1, 3, −5, 5, −1}, {1, 5, 1, 1, −5, −1}, {1,−1, 1, −5, −3, 7}, {1, −5, 3, 3, 7, −1}, {1, −1, 7, 3, 7, −5}, {1, −7,−7, −3, −1, 7}, {1, 5, 5, −3, 7, −1}, {1, −5, 5, 3, 7, −7}, {1, 1, 5,−3, 7, −7}, {1, 5, −5, 5, −1, −1}, {1, −1, 3, 5, −1, −7}, {1, −7, 3, 7,−1, −1}, {1, 3, −5, 5, 1, −3}, {1, −7, 3, 3, −5, −1}, {1, 1, −3, 1, 3,7}, {1, −5, 1, 5, 7, 7}, {1, −1, −7, 3, −5, −3}, {1, 1, −7, 3, 7, −1},{1, 5, −1, 1, 1, −7}, {1, 7, −7, −3, 7, 7}, {1, −7, −7, −3, 7, −7}, {1,5, 7, 1, 1, −5}, {1, 1, 3, 7, −1, −7}, {1, 5, 5, −3, 5, 7}, {1, −5, 3,7, −7, 1}, {1, −1, 1, −7, 3, −3}, {1, −5, 3, 5, −7, 5}, {1, −3, 5, 3,−7, −3}, {1, −1, 5, 1, −7, −3}, {1, 1, −5, −1, 7, −1}, {1, −7, −5, 5,−3, 1}, {1, −5, 1, 3, 7, 7}, {1, 3, −3, 7, −1, 3}, {1, −7, −5, −7, −3,7}, {1, 5, 7, −3, 7, 7}, {1, −7, 3, −3, −1, 3}, {1, 3, −5, 3, 7, 1}, {1,−7, 3, 1, −5, −1}, {1, 1, −5, 3, 5, −7}, {1, 5, −7, 1, −3, 3}, {1, −1,3, 7, −3, −7}, {1, 3, −7, 3, −3, −3}, {1, −1, −7, 1, 3, 7}, {1, 1, 3, 7,1, −7}, {1, 3, −5, −1, −1, 7}, {1, −5, −3, −5, 5, −1}, {1, −7, −5, −5,−1, 7}, {1, 1, −7, −5, −1, 7}, {1, 5, −7, 7, −1, −5}, {1, 7, 1, 1, −5,−3}, {1, 5, 7, 7, −1, 7}, {1, −7, 3, −5, −1, 1}, {1, −5, 5, −5, −1, −1},{1, 7, 1, −5, −3, −3}, {1, 3, −3, 1, −7, 1}, {1, 1, 3, −5, 5, −3}, or{1, 3, 3, −5, −1, −7} (where these sequences are denoted as a sequenceset P for ease of subsequent description).

Specifically, for the comb-2 structure, the terminal may determine,based on the preset condition and the sequence {s(n)}, the firstsequence used to generate the reference signal transmitted on the combs2 in the comb-2. {s(n)} may be selected from a sequence combination(referred to as a “sequence set 4” below). The sequence set 4 may be 100sequences modulated by using 8 PSK, or may be 100 sequences modulated byusing 16 PSK, or may be 100 sequences modulated by using 32 PSK.

In addition, for the comb-2 structure, the terminal may determine, basedon the preset condition and the sequence {s(n)}, the first sequence usedto generate the reference signal transmitted on the combs 2 in thecomb-2. {s(n)} may be determined in the sequence combination (referredto as the “sequence set 4” below). The sequence set 4 may be some of aplurality of sequences modulated by using 8 PSK, or may be some of aplurality of sequences modulated by using 16 PSK, or may be some of aplurality of sequences modulated by using 32 PSK.

In the following, unless otherwise specified, the first sequence, thesequence {x(n)}, or the sequence {x_(n)} may be obtained throughtransform by using the sequence sets A to P and the first sequence setto the eighth sequence set as base sequences.

It should be noted that some or all sequences included in the sequencecombination 3 may be the same as sequences in the sequence combination4. This is not limited in this application.

Optionally, A may be a modulation symbol, and may be carried on the Kelements included in the sequence. A does not change with n.

Optionally, A is a constant. For example, A=1. For example, A may be asymbol known to both the terminal device and the network device. A mayalternatively represent an amplitude.

It should be noted that, that A is a constant in a transmission timeunit does not mean that A is fixed. When the first signal is sent atdifferent moments, A may be variable. For example, all N elementsincluded in the sequence {x(n)} are equivalent to the reference signal,and A is an amplitude of the reference signal. When sending the signalfor the first time, the terminal device may send the signal based onA=1. When sending the signal for the second time, the terminal devicemay send the signal based on A=2.

Optionally, that the reference signal is generated by using the firstsequence may be specifically: The first sequence is repeated, and DFTtransform is performed to generate the reference signal.

Specifically, for the comb-2 structure, the terminal may repeat thefirst sequence by using [+1 +1] or [+1 −1]. After repeating the firstsequence by using [+1 +1] and performing the DFT transform, the terminalmay map odd-numbered sequences (which may be represented as 2p+delta,where p=0, . . . , L−1) in the 2K sequences to the combs 1 in thecomb-2, to generate the reference signal. After repeating the firstsequence by using [+1 −1] and performing the DFT transform, the terminalmay map even-numbered sequences in the 2K sequences to the combs 2 inthe comb-2, to generate the reference signal.

In the following embodiments, Φ(0), . . . , Φ(5) are used to representelements in {x(n)}.

In another embodiment, for the comb-2 structure, after repeating thefirst sequence, the terminal may obtain {Φ(0), . . . , Φ(5), Φ(0), . . ., Φ(5)} or {Φ(0), . . . , Φ(5), −Φ(0), . . . , −Φ(5)}. After performingthe DFT transform on {Φ(0), . . . , Φ(5), Φ(0), . . . , Φ(5)}, theterminal may map a sequence including 12 elements to the combs 1 in thecomb-2, to obtain a frequency-domain reference signal on even-numberedsubcarriers. After performing the DFT transform on {Φ(0), . . . , Φ(5),−Φ(0), . . . , −Φ(5)}, the terminal may map a sequence including 12elements to the combs 2 in the comb-2 to obtain a frequency-domainreference signal on odd-numbered subcarriers.

For the comb-4 structure, the terminal may repeat the first sequence byusing [+1 +1 +1 +1], [+1 −1 +1 −1], [+1 +1 −1 −1], or [+1 −1 +1 −1].After repeating the first sequence by using [+1 +1 +1 +1] and performingthe DFT transform, the terminal may map sequences numbered 4p+delta(delta=0) in the 4K sequences to combs 1 shown in FIG. 5, to generatethe reference signal. After repeating the first sequence by using [+1 −1+1 −1] and performing the DFT transform, the terminal may map sequencesnumbered 4p+delta (delta=1) in the 4K sequences to combs 2 shown in FIG.5, to generate the reference signal. After repeating the first sequenceby using [+1 −1 +1 −1] and performing the DFT transform, the terminalmay map sequences numbered 4p+delta (delta=2) in the 4K sequences tocombs 3 shown in FIG. 5, to generate the reference signal. Afterrepeating the first sequence by using [+1 −1 +1 −1] and performing theDFT transform, the terminal may map sequences numbered 4p+delta(delta=3) in the 4K sequences to combs 4 shown in FIG. 5, to generatethe reference signal.

In another embodiment, for the comb-4 structure, after repeating thefirst sequence, the terminal may obtain {Φ(0), . . . , Φ(5), Φ(0), . . ., Φ(5), Φ(0), . . . , Φ(5), Φ(0), . . . , Φ(5)} {Φ(0), . . . , Φ(5),j×Φ(0), . . . , j×Φ(5), −Φ(0), . . . , −Φ(5), −j×Φ(0), −j×Φ(5)}{Φ(0), .. . , Φ(5), −Φ(0), . . . , −Φ(5), Φ(0), . . . , Φ(5), −Φ(0), . . . ,−Φ(5)}, or {Φ(0), . . . , Φ(5), −j×Φ(0), . . . , −j×Φ(5), −Φ(0), . . . ,−Φ(5), j×Φ(0), . . . j×Φ(5)}. After performing the DFT transform on{Φ(0), . . . , Φ(5), Φ(0), . . . , Φ(5), Φ(0), . . . , Φ(5), Φ(0), . . ., Φ(5)}, the terminal may map the sequences each having the number of4p+delta (delta=0) in the 4K sequences to the combs 1 shown in FIG. 5,to generate the reference signal. After performing the DFT transform on{Φ(0), . . . , Φ(5), j×Φ(0), . . . j×Φ(5), −Φ(0), . . . , −Φ(5),−j×Φ(0), . . . , −j×Φ(5)}, the terminal may map the sequences eachhaving the number of 4p+delta (delta=1) in the 4K sequences to the combs2 shown in FIG. 5, to generate the reference signal. After performingthe DFT transform on {Φ(0), . . . , Φ(5), −Φ(0), . . . , −Φ(5), Φ(0), .. . , Φ(5), −Φ(0), . . . , −Φ(5)}, the terminal may map the sequenceseach having the number of 4p+delta (delta=2) in the 4K sequences to thecombs 3 shown in FIG. 5 to generate the reference signal. Afterperforming the DFT transform on {Φ(0), . . . , Φ(5), −j×Φ(0), . . . ,−j×Φ(5), −Φ(0), . . . , −Φ(5), j×Φ(0), . . . j×Φ(5)}, the terminal maymap the sequences each having the number of 4p+delta (delta=3) in the 4Ksequences to the combs 4 shown in FIG. 5, to generate the referencesignal.

It should be noted that, when K=6, to be specific, the first sequence isa sequence having a length of 6, and the first frequency-domain resourceincludes six subcarriers, the comb-4 structure needs to occupy 4K=24subcarriers (namely, two RBs) so that six subcarriers satisfying arequirement can be selected from the comb-4 structure. The comb-2structure needs to occupy 2K=12 subcarriers (namely, oneRB) so thatsubcarriers satisfying a requirement can be selected from the comb-2structure.

Optionally, when L=2, K=6, n=0, 1, 2, 3, 4, and 5, and delta=0, thegenerating the reference signal of the first signal includes: performingdiscrete Fourier transform on elements in a sequence {z(t)} to obtain asequence {f(t)}, where t=0, . . . , 2K−1; a sequence {z(a)}=the sequence{x(n)}, and a=0, . . . , K−1; a sequence {z(b)}=the sequence {x(n)}, andb=K, . . . , 2K−1; and x(n) represents the first sequence; and mappingelements numbered 2p+delta in the sequence {f(t)} to the K subcarriersnumbered k, to generate the reference signal, where p=0, . . . , L−1.

Specifically, the sequence {z(t)} may be obtained by repeating the firstsequence {x(n)} by using [+1 +1]. To be specific, when t=a, {z(a)}=thesequence {x(n)}, and a=0, . . . , K−1; when t=b, the sequence {z(b)}=thesequence {x(n)}, and b=K, . . . , 2K−1. Then, the terminal may performthe discrete Fourier transform (DFT) on the elements in the sequence{z(t)} to obtain the sequence {f(t)}, and map k elements numbered2p+delta (delta=0) in the sequence {f(t)} to the K subcarriers on thefirst frequency-domain resource, to generate the reference signal. Inthis embodiment of this application, the time-domain sequence {z(t)} canbe transformed into a frequency-domain sequence, and thefrequency-domain sequence is mapped to corresponding subcarriers.

For example, K elements in the sequence {f(t)} are mapped to Kequi-spaced subcarriers respectively. As shown in FIG. 6, a spacingbetween the K subcarriers is 1, and the K subcarriers are equally spacedin frequency domain. A spacing between subcarriers to which elementsf(0) to f(K−1) in the sequence {f(t)} are mapped is one subcarrier.Specifically, the elements f(0) to f(K−1) are mapped to the Kequi-spaced subcarriers respectively, subcarrier numbers are s+0, s+2, .. . , s+2(K−1), and s represents an index, of the first subcarrier ofthe K subcarriers to which the sequence {f(t)} is mapped, in subcarriersin a communications system.

Optionally, when L=2, K=6, n=0, 1, 2, 3, 4, and 5, and delta=1, thegenerating the reference signal of the first signal includes: performingdiscrete Fourier transform on elements in a sequence {z(t)} to obtain asequence {f(t)}, where t=0, . . . , 2K−1; a sequence {z(a)}=the sequence{−1·x(n)}, and a=0, . . . , K−1; a sequence {z(b)}=the sequence {x(n)},and b=K, . . . , 2K−1; and x(n) represents the first sequence; andmapping elements numbered 2p+delta in the sequence {f(t)} to the Ksubcarriers each having a subcarrier number of k, to generate thereference signal, where p=0, . . . , L−1. It should be understood thatL=2 may be merely an example, and when a value of L is another value,the method for generating the reference signal of the first signal isalso applicable.

Specifically, the sequence {z(t)} may be obtained by repeating the firstsequence {x(n)} by using [+1 −1]. To be specific, when t=a, {z(a)}=thesequence {x(n)}, and a=0, . . . , K−1; when t=b, the sequence {z(b)}=thesequence {x(n)}, and b=K, . . . , 2K−1. Then, the terminal may performthe discrete Fourier transform on the elements in the sequence {z(t)} toobtain the sequence {f(t)}, and map k elements numbered 2p+delta(delta=1) in the sequence {f(t)} to the K subcarriers on the firstfrequency-domain resource to generate the reference signal.

Optionally, when L=4, K=6, n=0, 1, 2, and 3, and delta=0, the generatingthe reference signal of the first signal includes: performing discreteFourier transform on elements in a sequence {z(t)} to obtain a sequence{f(t)} with t=0, . . . , 4K−1, where a sequence {z(a)}=the sequence{x(n)}, and a=0, . . . , K−1; a sequence {z(b)}=the sequence {x(n)}, andb=K, . . . , 2K−1; a sequence {z(c)}=the sequence {x(n)}, and c=2K, . .. , 3K−1; a sequence {z(d)}=the sequence {x(n)}, and d=3K, . . . , 4K−1;and x(n) represents the first sequence; and mapping elements numbered4p+delta in the sequence {f(t)} to the K subcarriers each having asubcarrier number of k, to generate the reference signal, where p=0, . .. , L−1.

Specifically, the terminal may repeat the sequence {x(n)} by using [+1+1 +1 +1] to obtain the sequence {z(t)}, perform the DFT on the sequence{z(t)} to obtain {f(t)}, and map elements numbered 4p (p=0, 1, 2, and 3)in the sequence to subcarriers numbered u+4*n (where n=0, 1, 2, and 3).

Optionally, when L=4, K=6, n=0, 1, 2, and 3, and delta=1, the generatingthe reference signal of the first signal includes: performing discreteFourier transform on elements in a sequence {z(t)} to obtain a sequence{f(t)}, where a sequence {z(a)}=the sequence {x(n)}, and a=0, . . . ,K−1; a sequence {z(b)}=the sequence {−1·x(n)}, and b=K, . . . , 2K−1; asequence {z(c)}=the sequence {x(n)}, and c=2K, . . . , 3K−1; a sequence{z(d)}=the sequence {−1·x(n)}, and d=3K, . . . , 4K−1; and x(n)represents the first sequence; and mapping elements numbered 4p+delta inthe sequence {f(t)} to the K subcarriers each having a subcarrier numberof k, to generate the reference signal, where p=0, . . . , L−1.

Specifically, the terminal may repeat the sequence {x(n)} by using [+1−1 +1 −1] to obtain the sequence {z(t)}, perform the DFT on the sequence{z(t)} to obtain {f(t)}, and map elements numbered 4p+1 (p=0, 1, 2, and3) in the sequence to subcarriers numbered u+4*n+1 (where n=0, 1, 2, and3).

Optionally, when L=4, K=6, n=0, 1, 2, and 3, and delta=2, the generatingthe reference signal of the first signal includes: performing discreteFourier transform on elements in a sequence {z(t)} to obtain a sequence{f(t)}, where a sequence {z(a)}=the sequence {x(n)}, and a=0, . . . ,K−1; a sequence {z(b)}=the sequence {x(n)}, and b=K, . . . , 2K−1; asequence {z(c)}=the sequence {−1·x(n)}, and c=2K, . . . , 3K−1; asequence {z(d)}=the sequence {−1·x(n)}, and d=3K, . . . , 4K−1; and x(n)represents the first sequence; and mapping elements numbered 4p+delta inthe sequence {f(t)} to the K subcarriers each having a subcarrier numberof k, to generate the reference signal, where p=0, . . . , L−1.

Specifically, the terminal may repeat the sequence {x(n)} by using [+1+1 −1 −1] to obtain the sequence {z(t)}, perform the DFT on the sequence{z(t)} to obtain {f(t)}, and map elements numbered 4p+2 (p=0, 1, 2, and3) in the sequence to subcarriers numbered u+4*n+2 (where n=0, 1, 2, and3).

Optionally, when L=4, K=6, n=0, 1, 2, and 3, and delta=3, the generatingthe reference signal of the first signal includes: performing discreteFourier transform on elements in a sequence {z(t)} to obtain a sequence{f(t)}, where a sequence {z(a)}=the sequence {x(n)}, and a=0, . . . ,K−1; a sequence {z(b)}=the sequence {−1·x(n)}, and b=K, . . . , 2K−1; asequence {z(c)}=the sequence {−1·x(n)}, and c=2K, . . . , 3K−1; asequence {z(d)}=the sequence {x(n)}, and d=3K, . . . , 4K−1; and x(n)represents the first sequence; and mapping elements numbered 4p+delta inthe sequence {f(t)} to the K subcarriers each having a subcarrier numberof k, to generate the reference signal, where p=0, . . . , L−1.

Specifically, the terminal may repeat the sequence {x(n)} by using [+1−1 +1 −1] to obtain the sequence {z(t)}, perform the DFT on the sequence{z(t)} to obtain {f(t)}, and map elements numbered 4p+3 (p=0, 1, 2, and3) in the sequence to subcarriers numbered u+4*n+3 (where n=0, 1, 2, and3).

Optionally, step 403 may specifically include: Filter the firstsequence, then perform DFT transform, and map a sequence obtained afterthe filtering and the DFT to the first frequency-domain resource, toobtain the reference signal. For example, as shown in FIG. 7, {f(t)} isobtained after filtering is performed on the first sequence {x(n)} andthen the DFT is performed.

Optionally, step 403 may specifically include: Perform DFT transform onthe first sequence, then perform filtering, and map a sequence obtainedafter the DFT and the filtering to the first frequency-domain resource,to obtain the reference signal. For example, as shown in FIG. 8, {f(t)}is obtained after the DFT is performed on the first sequence {x(n)} andthen filtering is performed.

Optionally, the terminal device performs DFT processing on the Nelements in the sequence {x_(n)} to obtain a sequence {f_(n)}. Herein,this mainly means that the terminal device performs DFT processing on Nelements in a configured sequence {x_(n)} to obtain a frequency-domainsequence. The frequency-domain sequence is the sequence {f_(n)}. Then,the terminal device maps the sequence {1} to the N subcarriers, togenerate the first signal, and sends the first signal to the networkdevice.

Optionally, a specific process in which the terminal device performs DFTprocessing on the sequence {x_(n)} including N elements to obtain afrequency-domain sequence, then maps the frequency-domain sequence tothe N subcarriers respectively to generate the first signal and sendsthe first signal to the network device includes the following steps.

The terminal device performs the DFT processing on the sequence {x_(n)}including the N elements, to obtain the sequence {f_(n)}.

With reference to the foregoing descriptions, in a single embodiment,refer to FIG. 18. During execution of S301, in a process in which theterminal device performs the DFT processing on the sequence to obtainthe sequence {f_(n)}, a filter may not be used. Optionally, in a processin which the terminal device performs the DFT processing on the sequence{x_(n)} to obtain the sequence {f_(n)}, DFT processing may be performedafter the filter is used. Optionally, in a process in which the terminaldevice performs the DFT processing on the sequence {x_(n)} to obtain thesequence {f_(n)}, the terminal device may obtain the sequence by using afilter after performing DFT processing.

S302: The terminal device maps the sequence to the N subcarriersrespectively to obtain an N-point frequency-domain signal.

In a specific implementation, the N-point frequency-domain signalincludes frequency-domain signals of N elements.

In the following embodiments of this application, s represents an index,of the first subcarrier of the K subcarriers to which the sequence {1}is mapped, in subcarriers in a communications system.

Optionally, the terminal device maps N elements in the sequence {f_(n)}to N consecutive subcarriers respectively. Optionally, elements f₀ tof_(N−1) in the sequence {f_(n)} are mapped to N consecutive subcarriers,and reference signs of the subcarrier are s+0, s+1, . . . , s+N−1.

In a possible example, the terminal device sequentially maps the Nelements in the sequence {f_(n)} to the N subcarriers in descendingorder of the subcarriers. One element in the sequence {f_(n)} is mappedto one frequency-domain subcarrier. The frequency-domain subcarrier is aminimum unit of a frequency-domain resource, and is used to carry datainformation.

In a possible example, the terminal device sequentially maps the Nelements in the sequence {f_(n)} to the N subcarriers in ascending orderof the subcarriers. One element in the sequence {f_(n)} is mapped to onesubcarrier, and the subcarrier carries the element. After the mapping,when the terminal device sends data by using a radio frequency, it isequivalent to that the element is sent on the subcarrier. In thecommunications system, different terminal devices may send data byoccupying different subcarriers. Positions of the N subcarriers in aplurality of subcarriers in the communications system may be predefinedor configured by the network device by using signaling.

Optionally, the N elements in the sequence may alternatively be mappedto N equi-spaced subcarriers respectively. Optionally, a spacing betweenthe K subcarriers is 1, and the N subcarriers are equally spaced infrequency domain. A spacing between the subcarriers to which theelements f₀ to f_(N−1) in the sequence {f_(n)} are mapped is onesubcarrier. Specifically, the elements f₀ to f_(N−1) are mapped to the Nequi-spaced subcarriers respectively, and subcarrier numbers are s+0,s+2, . . . , s+2(N−1).

In the embodiments of this application, a manner in which the N elementsin the sequence {f_(n)} are mapped to the N subcarriers respectively isnot limited to the foregoing manners.

S303: The terminal device performs inverse fast Fourier transform (IFFT)on the frequency-domain signal including the N elements, to obtain acorresponding time-domain signal, and adds a cyclic prefix to thetime-domain signal, to generate the first signal.

S304: The terminal device sends the first signal by using the radiofrequency.

Optionally, when S303 is performed, the time-domain signal obtained bythe terminal device by performing the IFFT on the generated N-pointfrequency-domain signal is an orthogonal frequency division multiplexing(OFDM) symbol. When S303 is performed, the terminal device sends thefirst signal by using the radio frequency. In other words, the terminaldevice sends, on the N subcarriers, the first signal that carries thesequence {f_(n)}.

Optionally, the terminal device may send, on one OFDM symbol, the firstsignal that carries the sequence {f_(n)}, or may send, on a plurality ofOFDM symbols, the first signal that carries the sequence {f_(n)}.

It should be noted that, in the embodiments of this application, amanner of generating the first signal is not limited to the foregoingimplementation in which the terminal device performs the DFT processingon the sequence {x(n)} including the N elements to obtain thefrequency-domain sequence, then maps the frequency-domain sequence tothe N subcarriers respectively, to generate the first signal, and sendsthe first signal to the network device.

Optionally, a sequence {y_(n)} may be obtained by using a shaping filterfor the sequence {x(n)}, then the sequence {y_(n)} is modulated to acarrier to generate the first signal, and the first signal is sent tothe network device.

It should be understood that, after the DFT transform is performed onthe first sequence in step 403, filtering may not be performed, and asequence obtained after the DFT is directly mapped to the firstfrequency-domain resource to obtain the reference signal. As shown inFIG. 9, {f(t)} is obtained after the DFT transform is performed on thefirst sequence {x(n)}.

It should be noted that, that an element in a sequence is mapped to onesubcarrier may be understood as that the subcarrier carries the element.After the mapping, the terminal may perform sending by using a radiofrequency.

404: The network device generates a local sequence, where the localsequence may be the first sequence or a conjugate transpose of the firstsequence.

Specifically, the network device may prestore a mapping relationshipbetween the first sequence and a frequency-domain resource, or agree ona mapping relationship in a protocol. In this way, the network devicemay determine first sequences corresponding to differentfrequency-domain resources. Alternatively, if the network devicedetermines to receive the reference signal only on some frequency-domainresources of the comb structure, the network device may generate onlyfirst sequences corresponding to the some frequency-domain resources.

For example, after accessing a network, the terminal may send a PUSCH ora DMRS by using the configured sequence {x(n)}, and the network devicereceives the PUSCH or the DMRS by using the sequence {x(n)} configuredfor the terminal device.

405: The terminal sends the reference signal on the firstfrequency-domain resource. Correspondingly, the network device receivesthe reference signal on the first frequency-domain resource.

Specifically, in frequency-domain resources of a comb structure,reference signals mapped to frequency-domain resources on differentcombs may be generated by using different sequences. In other words, thereference signals on different frequency-domain resources may begenerated by selecting different sequences as required, therebyimproving performance of the reference signals transmitted on thefrequency-domain resources of the comb structure. For example, theperformance may be at least one of a relatively low peak to averagepower ratio (peak to average power ratio, PAPR), a relatively lowcorrelation, relatively good frequency-domain flatness, and a relativelygood time-domain auto-correlation.

It should be noted that the terminal may further send the first signalon the first frequency-domain resource. The first frequency-domainresource may be the same as a frequency-domain resource for sending thereference signal, but a time-domain resource for sending the firstsignal is different from a time-domain resource for sending thereference signal. This is not limited in this application.

406: The network device processes the first signal based on the localsequence.

Specifically, the terminal device determines a corresponding localsequence based on the first frequency-domain resource for receiving thereference signal, determines channel quality information based on thelocal sequence and the reference signal, and then processes the firstsignal based on the channel quality information. When the local sequenceis the first sequence, the network device may determine the channelquality information based on a ratio of the reference signal to thefirst sequence. When the local sequence is a conjugate of the firstsequence, the network device may determine the channel qualityinformation based on a product of the reference signal and the conjugateof the first sequence.

The following describes another embodiment of the present disclosure.The embodiment relates to a sequence-based signal processing method,including:

determining a sequence {x_(n)}, where x_(n) is an element in thesequence {x_(n)}, the sequence {x_(n)} is a sequence satisfying a presetcondition, and the preset condition is:

the preset condition is x_(n)=y_((n+M)mod K), where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, j=√{squareroot over (−1)}, and a set of sequence {s_(n)} including an elements_(n) includes at least one of sequences in a first sequence set; and

the sequences included in the first sequence set include:

{1, 1, 3, −7, 5, −3}, {1, 1, 5, −7, 3, 5}, {1, 1, 5, −5, −3, 7}, {1, 1,−7, −5, 5, −7}, {1, 1, −7, −3, 7, −7}, {1, 3, 1, 7, −1, −5}, {1, 3, 1,−7, −3, 7}, {1, 3, 1, −7, −1, −5}, {1, 3, 3, 7, −1, −5}, {1, 5, 1, 1,−5, −3}, {1, 5, 1, 3, −5, 5}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 3, −3, 1},{1, 5, 1, 3, −1, −7}, {1, 5, 1, 5, 3, −7}, {1, 5, 1, 5, 3, −5}, {1, 5,1, 5, 7, 7}, {1, 5, 1, 5, −5, 3}, {1, 5, 1, 5, −3, 3}, {1, 5, 1, 5, −1,3}, {1, 5, 1, 5, −1, −1}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, −5, 5}, {1,5, 1, −5, 3, 5}, {1, 5, 1, −5, −7, −1}, {1, 5, 1, −5, −5, −3}, {1, 5, 1,−5, −3, 1}, {1, 5, 1, −5, −1, 1}, {1, 5, 1, −5, −1, 5}, {1, 5, 1, −5,−1, −1}, {1, 5, 1, −3, 1, 7}, {1, 5, 1, −3, 1, −5}, {1, 5, 1, −3, 7,−7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1, 5, 1, −1, 3, −5},{1, 5, 1, −1, 5, −7}, {1, 5, 1, −1, −7, −3}, {1, 5, 1, −1, −5, −3}, {1,5, 3, −3, −7, −5}, {1, 5, 3, −3, −7, −1}, {1, 5, 3, −3, −1, −7}, {1, 5,3, −1, 5, −7}, {1, 5, 3, −1, −5, −3}, {1, 5, 5, 1, 3, −3}, {1, 5, 5, −1,−7, −5}, {1, 7, 1, 1, 1, −5}, {1, 7, 1, 1, −7, −7}, {1, 7, 1, 1, −5,−5}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, −7, 1, 1}, {1,7, 1, −7, −7, −7}, {1, 7, 1, −5, 1, 1}, {1, 7, 1, −5, −5, 1}, {1, 7, 1,−5, −3, 1}, {1, 7, 1, −5, −1, 1}, {1, 7, 1, −5, −1, −1}, {1, 7, 1, −1,5, 7}, {1, 7, 3, 1, 5, −3}, {1, 7, 3, 1, −5, −5}, {1, 7, 3, 5, −5, −7},{1, 7, 3, −7, 7, −1}, {1, 7, 3, −7, −5, 3}, {1, 7, 3, −5, −7, −1}, {1,7, 3, −3, −5, 1}, {1, 7, 3, −3, −5, −1}, {1, 7, 3, −3, −3, −3}, {1, 7,3, −1, −5, −3}, {1, 7, 5, 1, −5, −5}, {1, 7, 5, 1, −5, −3}, {1, 7, 5,−5, 3, −1}, {1, 7, 5, −5, −3, −7}, {1, 7, 5, −3, −7, 1}, {1, 7, 5, −1,−5, −5}, {1, 7, 5, −1, −5, −3}, {1, −7, 1, −5, 1, 1}, {1, −7, 3, 3, −5,−5}, {1, −7, 3, 5, −1, −3}, {1, −7, 3, −5, 1, 1}, {1, −7, 3, −5, −5, 1},{1, −7, 3, −5, −5, −5}, {1, −7, 5, −3, −5, 1}, {1, −5, 1, 1, 3, 7}, {1,−5, 1, 1, 5, 7}, {1, −5, 1, 1, 7, 7}, {1, −5, 1, 3, 3, 7}, {1, −5, 1, 7,5, −1}, {1, −5, 1, 7, 7, 1}, {1, −5, 1, −7, −7, 1}, {1, −5, 1, −7, −7,−7}, {1, −5, 3, −7, −7, 1}, {1, −5, 5, 3, −5, −3}, {1, −5, 5, 3, −5,−1}, {1, −5, 5, 5, −5, −3}, {1, −5, 5, 5, −5, −1}, {1, −5, 5, 7, −5, 1},{1, −5, 5, 7, −5, 3}, {1, −5, 5, −7, −5, 1}, {1, −5, 5, −7, −5, 3}, {1,−5, 7, 3, 5, −3}, {1, −5, −7, 3, 5, −3}, {1, −5, −7, 3, 5, −1}, {1, −5,−7, 3, 7, −1}, {1, −3, 1, 1, 3, 7}, {1, −3, 1, 1, 5, 7}, {1, −3, 1, 1,5, −1}, {1, −3, 1, 3, 3, 7}, {1, −3, 1, 3, −7, 7}, {1, −3, 1, 5, 7, 1},{1, −3, 1, 5, 7, 3}, {1, −3, 1, 5, 7, 7}, {1, −3, 1, 5, −7, 3}, {1, −3,1, 7, −5, 5}, {1, −3, 1, 7, −1, 3}, {1, −3, 1, −7, 3, −1}, {1, −3, 1,−7, 7, −1}, {1, −3, 1, −7, −5, 5}, {1, −3, 1, −7, −3, 3}, {1, −3, 1, −5,7, −1}, {1, −3, 3, 3, −7, 7}, {1, −3, 3, 5, −5, −7}, {1, −3, 3, 7, 7,7}, {1, −3, 3, 7, −7, 5}, {1, −3, 3, −7, −7, 3}, {1, −3, 3, −5, −7, −1},{1, −3, 7, −5, 3, 5}, {1, −1, 1, 7, 3, −7}, {1, −1, 1, 7, 3, −5}, {1,−1, 1, −5, 5, −7}, {1, −1, 3, −7, −5, 7}, {1, −1, 5, −7, −5, 5}, {1, −1,5, −7, −5, 7}, {1, −1, 5, −5, −5, 5}, and {1, −1, 5, −5, −5, 7};

{1, 1, 5, −7, 3, 7}, {1, 1, 5, −7, 3, −3}, {1, 1, 5, −1, 3, 7}, {1, 1,5, −1, −7, −3}, {1, 3, 1, 7, −1, −7}, {1, 3, 1, −7, 1, −5}, {1, 3, 1,−7, 3, −5}, {1, 3, 1, −7, −1, −7}, {1, 3, 1, −5, 1, −7}, {1, 3, 1, −5,3, −7}, {1, 3, 5, −7, 3, 7}, {1, 3, 5, −1, 3, 7}, {1, 3, 5, −1, 3, −3},{1, 3, 5, −1, −5, 7}, {1, 3, 7, 1, 5, 7}, {1, 3, 7, −7, 3, 7}, {1, 3, 7,−5, 5, 7}, {1, 5, 1, 1, 5, −7}, {1, 5, 1, 1, 5, −3}, {1, 5, 1, 5, 5,−7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1,5, 1, 5, −3, 1}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 5, −1, 3}, {1, 5, 1, 7,−3, −5}, {1, 5, 1, −7, 1, −3}, {1, 5, 1, −7, −3, 5}, {1, 5, 1, −5, 5,7}, {1, 5, 1, −5, −3, 7}, {1, 5, 1, −3, 1, −7}, {1, 5, 1, −3, 5, −7},{1, 5, 1, −3, 7, −7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1,5, 3, 1, 5, −7}, {1, 5, 3, 1, 5, −3}, {1, 5, 3, 7, −3, −5}, {1, 5, 3, 7,−1, 3}, {1, 5, 3, −7, −3, 7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −1, −5,−3}, {1, 5, 5, −1, 3, 7}, {1, 5, 5, −1, 3, −3}, {1, 5, 7, 1, 3, −3}, {1,5, −7, −3, 7, 7}, {1, 7, 1, 1, 3, −5}, {1, 7, 1, 1, −7, −5}, {1, 7, 1,1, −1, −7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −5,−5}, {1, 7, 1, 3, −1, −5}, {1, 7, 1, 5, −1, −3}, {1, 7, 1, 7, −7, −7},{1, 7, 1, 7, −1, −1}, {1, 7, 1, −7, 1, −1}, {1, 7, 1, −7, −5, −5}, {1,7, 1, −7, −1, 1}, {1, 7, 1, −7, −1, −1}, {1, 7, 1, −5, −7, 1}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −5, −5, 3}, {1, 7, 1, −5, −1, 3}, {1, 7, 1, −5,−1, −3}, {1, 7, 1, −3, −7, −5}, {1, 7, 1, −3, −7, −1}, {1, 7, 1, −3, −1,5}, {1, 7, 1, −1, 1, −7}, {1, 7, 1, −1, 7, −7}, {1, 7, 1, −1, −7, −3},{1, 7, 3, 1, 7, −5}, {1, 7, 3, 1, 7, −3}, {1, 7, 3, 5, −1, −5}, {1, 7,3, −7, 7, −3}, {1, 7, 3, −7, −3, 3}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, −7, −5}, {1, 7, 3, −3, −7, −1}, {1, 7, 3, −3, −1, −5}, {1, 7, 3, −1,−7, −5}, {1, 7, 5, −1, 3, −3}, {1, 7, 5, −1, −7, −7}, {1, 7, 5, −1, −7,−3}, {1, −7, 1, 3, −3, 3}, {1, −7, 1, −7, 1, 1}, {1, −7, 3, 1, 7, −1},{1, −7, 3, 1, −7, −5}, {1, −7, 3, 1, −7, −1}, {1, −7, 3, 3, −3, −5}, {1,−7, 3, 5, −3, −5}, {1, −7, 3, −5, −7, −1}, {1, −7, 3, −5, −3, 3}, {1,−7, 3, −3, −3, 3}, {1, −7, 5, 1, −7, −3}, {1, −5, 1, 1, 3, −7}, {1, −5,1, 1, −7, 7}, {1, −5, 1, 3, 3, −7}, {1, −5, 1, 3, −7, 5}, {1, −5, 1, 5,3, 7}, {1, −5, 1, 5, 3, −3}, {1, −5, 1, 5, −7, 3}, {1, −5, 1, 5, −7, 7},{1, −5, 1, 7, 3, −1}, {1, −5, 1, 7, 5, −1}, {1, −5, 1, 7, 7, −7}, {1,−5, 1, 7, 7, −1}, {1, −5, 1, 7, −7, 1}, {1, −5, 1, 7, −7, 5}, {1, −5, 1,7, −1, 1}, {1, −5, 1, −7, 3, 1}, {1, −5, 1, −7, 7, −7}, {1, −5, 1, −7,7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −7, −5, 3}, {1, −5, 1, −3, 3,5}, {1, −5, 1, −1, 3, 7}, {1, −5, 1, −1, 7, 7}, {1, −5, 3, 1, 7, 7}, {1,−5, 3, 5, −5, 3}, {1, −5, 3, 5, −3, 3}, {1, −5, 3, −7, 7, 1}, {1, −5, 3,−7, 7, −1}, {1, −5, 3, −7, −5, 3}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1,−5, −3}, {1, −5, 5, 3, −7, 1}, {1, −5, 5, 3, −7, −3}, {1, −5, 5, 7, 3,−3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −1, 3, 5}, {1, −5, 7, 1, 3, −3},{1, −5, 7, 1, 3, −1}, {1, −5, 7, 1, 5, −1}, {1, −5, −7, 3, 3, −3}, {1,−5, −7, 3, 7, 1}, {1, −5, −7, 3, 7, −3}, {1, −3, 1, 5, −3, 1}, {1, −3,1, 7, 5, −5}, {1, −3, 1, 7, −5, 5}, {1, −3, 1, −7, −5, 5}, {1, −3, 1,−7, −3, 1}, {1, −3, 1, −7, −3, 5}, {1, −3, 1, −5, −3, 7}, {1, −3, 3, 7,−3, 3}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −5, 7}, {1, −3, 3, −7, −3,3}, {1, −1, 1, 7, −1, −7}, {1, −1, 1, −7, 3, −5}, {1, −1, 1, −7, −1, 7},{1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, −5}, and {1, −1, 5, −7, 3, 7};

{1, 1, 5, −5, 3, −3}, {1, 1, 7, −5, 7, −1}, {1, 1, 7, −1, 3, −1}, {1, 1,−5, 3, −1, 3}, {1, 1, −5, 7, −5, 3}, {1, 1, −3, 7, −1, 5}, {1, 3, 7, −5,3, −3}, {1, 3, −1, −7, 1, 5}, {1, 5, 1, −7, 3, 3}, {1, 5, 1, −5, −5, 1},{1, 5, 3, −1, −5, 3}, {1, 5, 5, 1, −5, 3}, {1, 5, 7, 3, −3, 5}, {1, 5,−7, 1, −5, 7}, {1, 5, −7, −5, 7, 1}, {1, 5, −5, 3, −3, −7}, {1, 5, −5,3, −1, −5}, {1, 5, −5, −5, 5, −3}, {1, 5, −3, 3, 3, −3}, {1, 5, −3, 7,3, 5}, {1, 7, 7, 1, −7, 5}, {1, 7, 7, 1, −3, 1}, {1, 7, −5, 7, −1, −7},{1, 7, −5, −7, 5, 1}, {1, 7, −5, −5, 7, 1}, {1, 7, −1, 3, −1, −7}, {1,7, −1, −7, 5, 5}, {1, 7, −1, −5, 7, 5}, {1, −7, 3, 3, −7, −3}, {1, −7,3, −1, 1, 5}, {1, −7, 5, 1, −1, 3}, {1, −7, 5, −7, −1, −1}, {1, −7, −3,1, 3, −1}, {1, −7, −3, −7, 3, 3}, {1, −7, −1, 3, 3, −1}, {1, −7, −1, −1,−7, 5}, {1, −5, 3, 7, −5, −3}, {1, −5, 3, −1, 3, −7}, {1, −5, 7, 7, −5,1}, {1, −5, 7, −7, −3, 1}, {1, −5, 7, −5, 3, −7}, {1, −5, −5, 1, 5, 1},{1, −5, −5, 1, −7, −3}, {1, −3, 1, 7, 7, 1}, {1, −3, 1, −7, −1, −1}, {1,−3, 5, −5, −1, −3}, {1, −3, 5, −1, −1, 5}, {1, −3, 7, 7, −3, 5}, {1, −3,7, −1, 3, 7}, {1, −3, 7, −1, 5, −7}, {1, −3, −7, 1, 7, −5}, {1, −3, −7,7, −5, 1}, {1, −3, −3, 1, 7, −1}, {1, −3, −1, 3, 7, −1}, {1, −1, 3, −7,1, −3}, and {1, −1, −5, 7, −1, 5};

{1, 3, 7, −5, 1, −3}, {1, 3, −7, 5, 1, 5}, {1, 3, −7, −3, 1, −3}, {1, 3,−1, −5, 1, 5}, {1, 5, 1, −3, 3, 5}, {1, 5, 1, −3, 7, 5}, {1, 5, 1, −3,−5, 5}, {1, 5, 1, −3, −1, 5}, {1, 5, 3, −3, −7, 5}, {1, 5, 7, 3, −1, 5},{1, 5, 7, −3, −7, 5}, {1, 5, −7, 3, 1, −3}, {1, 5, −7, 5, 1, 7}, {1, 5,−7, 7, 3, −1}, {1, 5, −7, −5, 1, −3}, {1, 5, −7, −1, 1, −3}, {1, 5, −5,7, 3, 5}, {1, 5, −5, −3, −7, 5}, {1, 5, −1, −5, 7, 5}, {1, 5, −1, −3,−7, 5}, {1, 7, 3, −1, 3, 7}, {1, 7, −7, 5, 1, 5}, {1, 7, −7, −3, 1, −3},{1, 7, −5, −1, 1, −3}, {1, −5, 7, 3, 1, 5}, {1, −5, −7, 5, 1, 5}, {1,−3, 1, 5, 7, −3}, {1, −3, 1, 5, −5, −3}, {1, −3, 3, 5, −7, −3}, {1, −3,−7, 3, 1, 5}, {1, −3, −7, 7, 1, 5}, {1, −3, −7, −5, 1, 5}, {1, −3, −7,−3, 1, −1}, {1, −3, −7, −1, 1, 5}, {1, −3, −5, 5, −7, −3}, {1, −3, −1,3, 7, −3}, {1, −3, −1, 5, −7, −3}, {1, −1, 3, 7, 3, −1}, {1, −1, −7, 5,1, 5}, and {1, −1, −5, 7, 1, 5};

{1, 3, −3, 1, 3, −3}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 3, 7}, {1,3, −3, −7, −5, 5}, {1, 3, −3, −1, 3, −3}, {1, 5, −1, −7, 3, 7}, {1, 7,3, 1, 5, −1}, {1, 7, 3, 1, 7, 5}, {1, 7, 3, 1, −5, −1}, {1, 7, 3, 1, −3,3}, {1, 7, 3, 5, −7, 3}, {1, 7, 3, 5, −1, 3}, {1, 7, 3, 7, 1, 3}, {1, 7,3, −7, 3, 7}, {1, 7, 3, −7, 5, −5}, {1, 7, 3, −7, 7, −3}, {1, 7, 3, −7,−3, 7}, {1, 7, 3, −7, −1, −3}, {1, 7, 3, −3, 1, −5}, {1, 7, 3, −3, 7,−5}, {1, 7, 3, −1, −7, −5}, {1, 7, 5, 1, 7, 5}, {1, 7, 5, −7, −1, −3},{1, 7, 5, −1, −7, −3}, {1, −5, −3, 1, −5, −3}, {1, −5, −3, 7, −5, 5},{1, −5, −3, −7, 3, 5}, {1, −5, −3, −7, 3, 7}, {1, −5, −3, −1, 3, −3},{1, −3, 3, 1, 3, −3}, {1, −3, 3, 1, 5, −1}, {1, −3, 3, 1, −5, −1}, {1,−3, 3, 5, −7, 3}, {1, −3, 3, 5, −1, 3}, {1, −3, 3, 7, −3, −5}, {1, −3,3, −7, 3, 7}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −3, 7}, {1, −3, 3,−3, 7, −5}, {1, −3, 3, −1, 5, 3}, {1, −1, 5, 1, −1, 5}, {1, −1, 5, −7,7, −3}, and {1, −1, 5, −7, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {13, 3, −3, 5, −5},{13, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5,7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5, −1, −7,−3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5, −3},{1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3}, {1, 5,1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1, −7, 5,−3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5, −3},{1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1, 5,3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5, 1,−5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {13, 3, −3, 5, −5},{13, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5,7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5, −1, −7,−3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5, −3},{1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3}, {1, 5,1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1, −7, 5,−3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5, −3},{1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1, 5,3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5, 1,−5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7}; or

{1, 1, −7, 5, −1, 1}, {1, 1, −7, 7, −3, 1}, {1, 1, −7, −5, 5, 1}, {1, 1,−7, −3, 3, 1}, {1, 1, −7, −3, −5, 1}, {1, 1, −7, −1, −3, 1}, {1, 3, 7,1, 5, 1}, {1, 3, −5, 3, 5, 1}, {1, 3, −5, 3, 5, −3}, {1, 3, −5, 7, −7,1}, {1, 3, −5, 7, −5, 5}, {1, 3, −5, 7, −1, 1}, {1, 3, −5, −5, 3, −1},{1, 3, −5, −3, 5, 1}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 1, 1}, {1,3, −1, 7, −7, 1}, {1, 5, 1, −7, −5, −1}, {1, 5, 3, −7, 1, 1}, {1, 5, 7,−1, −5, −1}, {1, 5, −5, −7, 1, 1}, {1, 5, −3, −5, 3, 1}, {1, 5, −1, 3,5, −3}, {1, 5, −1, 3, −3, −1}, {1, 5, −1, 3, −1, 7}, {1, 7, 5, −7, 1,1}, {1, 7, 5, −3, −3, 5}, {1, 7, −5, 3, 3, −5}, {1, −7, 1, 3, −5, 7},{1, −7, 1, 3, −1, 7}, {1, −7, 5, 7, −1, 7}, {1, −7, 5, −7, 3, 7}, {1,−7, 5, −3, −1, 7}, {1, −7, 5, −1, 1, −7}, {1, −7, 7, −3, 1, −7}, {1, −7,7, −1, 3, −5}, {1, −7, 7, −1, −3, 5}, {1, −7, −7, 1, 3, −3}, {1, −7, −7,1, 5, −5}, {1, −7, −7, 1, 7, 5}, {1, −7, −7, 1, −3, 7}, {1, −7, −7, 1,−1, 5}, {1, −7, −5, 3, 5, −3}, {1, −7, −5, 3, −5, −3}, {1, −7, −5, 3,−1, 1}, {1, −7, −5, 3, −1, 7}, {1, −7, −5, 5, 1, −7}, {1, −7, −5, 7, −1,1}, {1, −7, −5, −1, −7, −3}, {1, −7, −3, 3, 1, −7}, {1, −7, −3, 5, 3,−5}, {1, −7, −3, −5, 1, −7}, {1, −7, −1, −3, 1, −7}, {1, −5, 7, −1, −1,7}, {1, −5, −3, 5, 5, −3}, {1, −5, −3, 7, −5, 5}, {1, −5, −1, −7, −5,5}, {1, −5, −1, −7, −3, 7}, {1, −5, −1, −5, 3, 5}, {1, −3, 1, −5, −1,1}, {1, −3, 5, 5, −3, −1}, {1, −3, 5, 7, −1, 1}, {1, −3, 5, 7, −1, 7},{1, −3, 7, −7, 1, 1}, {1, −3, −1, 7, −1, 1}, {1, −1, 3, −5, −5, 3}, {1,−1, 5, −7, 1, 1}, {1, −1, 5, −3, −3, 5}, {1, −1, 7, 5, −3, 1}, {1, −1,7, 7, −1, 3}, and {1, −1, 7, −5, 3, 1};

generating a first signal based on the sequence {x_(n)}; and

sending the first signal.

In an embodiment, the set of the sequence {s_(n)} includes at least oneof sequences in a second sequence set, and the second sequence setincludes some of the sequences in the first sequence set.

In an embodiment, the generating a first signal based on the sequence{x_(n)} includes:

performing discrete Fourier transform on N elements in the sequence{x_(n)} to obtain a sequence {f_(n)} including N elements;

mapping the N elements in the sequence {f_(n)} to N subcarriersrespectively to obtain a frequency-domain signal including the Nelements; and

generating the first signal based on the frequency-domain signal.

In an embodiment, the N subcarriers are N consecutive subcarriers, or Nequi-spaced subcarriers.

In an embodiment, before the performing discrete Fourier transform on Nelements in the sequence {x_(n)}, the first signal processing methodfurther includes: filtering the sequence {x_(n)}; or

after the performing discrete Fourier transform on N elements in thesequence {x_(n)}, the first signal processing method further includes:filtering the sequence {x_(n)}.

In an embodiment, the first signal is a reference signal of a secondsignal, and a modulation scheme of the second signal is π/2 binary phaseshift keying BPSK.

The following describes another embodiment of the present disclosure.The embodiment relates to a sequence-based signal processing apparatus,including:

a determining unit, configured to determine a sequence {x_(n)}, wherex_(n) is an element in the sequence {x_(n)} the sequence {x_(n)} is asequence satisfying a preset condition, and the preset condition is:

the preset condition is x_(n)=y_((n+M)mod K), where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, j=√{squareroot over (−1)}, and a set of sequence {s_(n)} including an elements_(n) includes at least one of sequences in a first sequence set; and

the sequences included in the first sequence set include:

{1, 1, 3, −7, 5, −3}, {1, 1, 5, −7, 3, 5}, {1, 1, 5, −5, −3, 7}, {1, 1,−7, −5, 5, −7}, {1, 1, −7, −3, 7, −7}, {1, 3, 1, 7, −1, −5}, {1, 3, 1,−7, −3, 7}, {1, 3, 1, −7, −1, −5}, {1, 3, 3, 7, −1, −5}, {1, 5, 1, 1,−5, −3}, {1, 5, 1, 3, −5, 5}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 3, −3, 1},{1, 5, 1, 3, −1, −7}, {1, 5, 1, 5, 3, −7}, {1, 5, 1, 5, 3, −5}, {1, 5,1, 5, 7, 7}, {1, 5, 1, 5, −5, 3}, {1, 5, 1, 5, −3, 3}, {1, 5, 1, 5, −1,3}, {1, 5, 1, 5, −1, −1}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, −5, 5}, {1,5, 1, −5, 3, 5}, {1, 5, 1, −5, −7, −1}, {1, 5, 1, −5, −5, −3}, {1, 5, 1,−5, −3, 1}, {1, 5, 1, −5, −1, 1}, {1, 5, 1, −5, −1, 5}, {1, 5, 1, −5,−1, −1}, {1, 5, 1, −3, 1, 7}, {1, 5, 1, −3, 1, −5}, {1, 5, 1, −3, 7,−7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1, 5, 1, −1, 3, −5},{1, 5, 1, −1, 5, −7}, {1, 5, 1, −1, −7, −3}, {1, 5, 1, −1, −5, −3}, {1,5, 3, −3, −7, −5}, {1, 5, 3, −3, −7, −1}, {1, 5, 3, −3, −1, −7}, {1, 5,3, −1, 5, −7}, {1, 5, 3, −1, −5, −3}, {1, 5, 5, 1, 3, −3}, {1, 5, 5, −1,−7, −5}, {1, 7, 1, 1, 1, −5}, {1, 7, 1, 1, −7, −7}, {1, 7, 1, 1, −5,−5}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, −7, 1, 1}, {1,7, 1, −7, −7, −7}, {1, 7, 1, −5, 1, 1}, {1, 7, 1, −5, −5, 1}, {1, 7, 1,−5, −3, 1}, {1, 7, 1, −5, −1, 1}, {1, 7, 1, −5, −1, −1}, {1, 7, 1, −1,5, 7}, {1, 7, 3, 1, 5, −3}, {1, 7, 3, 1, −5, −5}, {1, 7, 3, 5, −5, −7},{1, 7, 3, −7, 7, −1}, {1, 7, 3, −7, −5, 3}, {1, 7, 3, −5, −7, −1}, {1,7, 3, −3, −5, 1}, {1, 7, 3, −3, −5, −1}, {1, 7, 3, −3, −3, −3}, {1, 7,3, −1, −5, −3}, {1, 7, 5, 1, −5, −5}, {1, 7, 5, 1, −5, −3}, {1, 7, 5,−5, 3, −1}, {1, 7, 5, −5, −3, −7}, {1, 7, 5, −3, −7, 1}, {1, 7, 5, −1,−5, −5}, {1, 7, 5, −1, −5, −3}, {1, −7, 1, −5, 1, 1}, {1, −7, 3, 3, −5,−5}, {1, −7, 3, 5, −1, −3}, {1, −7, 3, −5, 1, 1}, {1, −7, 3, −5, −5, 1},{1, −7, 3, −5, −5, −5}, {1, −7, 5, −3, −5, 1}, {1, −5, 1, 1, 3, 7}, {1,−5, 1, 1, 5, 7}, {1, −5, 1, 1, 7, 7}, {1, −5, 1, 3, 3, 7}, {1, −5, 1, 7,5, −1}, {1, −5, 1, 7, 7, 1}, {1, −5, 1, −7, −7, 1}, {1, −5, 1, −7, −7,−7}, {1, −5, 3, −7, −7, 1}, {1, −5, 5, 3, −5, −3}, {1, −5, 5, 3, −5,−1}, {1, −5, 5, 5, −5, −3}, {1, −5, 5, 5, −5, −1}, {1, −5, 5, 7, −5, 1},{1, −5, 5, 7, −5, 3}, {1, −5, 5, −7, −5, 1}, {1, −5, 5, −7, −5, 3}, {1,−5, 7, 3, 5, −3}, {1, −5, −7, 3, 5, −3}, {1, −5, −7, 3, 5, −1}, {1, −5,−7, 3, 7, −1}, {1, −3, 1, 1, 3, 7}, {1, −3, 1, 1, 5, 7}, {1, −3, 1, 1,5, −1}, {1, −3, 1, 3, 3, 7}, {1, −3, 1, 3, −7, 7}, {1, −3, 1, 5, 7, 1},{1, −3, 1, 5, 7, 3}, {1, −3, 1, 5, 7, 7}, {1, −3, 1, 5, −7, 3}, {1, −3,1, 7, −5, 5}, {1, −3, 1, 7, −1, 3}, {1, −3, 1, −7, 3, −1}, {1, −3, 1,−7, 7, −1}, {1, −3, 1, −7, −5, 5}, {1, −3, 1, −7, −3, 3}, {1, −3, 1, −5,7, −1}, {1, −3, 3, 3, −7, 7}, {1, −3, 3, 5, −5, −7}, {1, −3, 3, 7, 7,7}, {1, −3, 3, 7, −7, 5}, {1, −3, 3, −7, −7, 3}, {1, −3, 3, −5, −7, −1},{1, −3, 7, −5, 3, 5}, {1, −1, 1, 7, 3, −7}, {1, −1, 1, 7, 3, −5}, {1,−1, 1, −5, 5, −7}, {1, −1, 3, −7, −5, 7}, {1, −1, 5, −7, −5, 5}, {1, −1,5, −7, −5, 7}, {1, −1, 5, −5, −5, 5}, and {1, −1, 5, −5, −5, 7};

{1, 1, 5, −7, 3, 7}, {1, 1, 5, −7, 3, −3}, {1, 1, 5, −1, 3, 7}, {1, 1,5, −1, −7, −3}, {1, 3, 1, 7, −1, −7}, {1, 3, 1, −7, 1, −5}, {1, 3, 1,−7, 3, −5}, {1, 3, 1, −7, −1, −7}, {1, 3, 1, −5, 1, −7}, {1, 3, 1, −5,3, −7}, {1, 3, 5, −7, 3, 7}, {1, 3, 5, −1, 3, 7}, {1, 3, 5, −1, 3, −3},{1, 3, 5, −1, −5, 7}, {1, 3, 7, 1, 5, 7}, {1, 3, 7, −7, 3, 7}, {1, 3, 7,−5, 5, 7}, {1, 5, 1, 1, 5, −7}, {1, 5, 1, 1, 5, −3}, {1, 5, 1, 5, 5,−7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1,5, 1, 5, −3, 1}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 5, −1, 3}, {1, 5, 1, 7,−3, −5}, {1, 5, 1, −7, 1, −3}, {1, 5, 1, −7, −3, 5}, {1, 5, 1, −5, 5,7}, {1, 5, 1, −5, −3, 7}, {1, 5, 1, −3, 1, −7}, {1, 5, 1, −3, 5, −7},{1, 5, 1, −3, 7, −7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1,5, 3, 1, 5, −7}, {1, 5, 3, 1, 5, −3}, {1, 5, 3, 7, −3, −5}, {1, 5, 3, 7,−1, 3}, {1, 5, 3, −7, −3, 7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −1, −5,−3}, {1, 5, 5, −1, 3, 7}, {1, 5, 5, −1, 3, −3}, {1, 5, 7, 1, 3, −3}, {1,5, −7, −3, 7, 7}, {1, 7, 1, 1, 3, −5}, {1, 7, 1, 1, −7, −5}, {1, 7, 1,1, −1, −7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −5,−5}, {1, 7, 1, 3, −1, −5}, {1, 7, 1, 5, −1, −3}, {1, 7, 1, 7, −7, −7},{1, 7, 1, 7, −1, −1}, {1, 7, 1, −7, 1, −1}, {1, 7, 1, −7, −5, −5}, {1,7, 1, −7, −1, 1}, {1, 7, 1, −7, −1, −1}, {1, 7, 1, −5, −7, 1}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −5, −5, 3}, {1, 7, 1, −5, −1, 3}, {1, 7, 1, −5,−1, −3}, {1, 7, 1, −3, −7, −5}, {1, 7, 1, −3, −7, −1}, {1, 7, 1, −3, −1,5}, {1, 7, 1, −1, 1, −7}, {1, 7, 1, −1, 7, −7}, {1, 7, 1, −1, −7, −3},{1, 7, 3, 1, 7, −5}, {1, 7, 3, 1, 7, −3}, {1, 7, 3, 5, −1, −5}, {1, 7,3, −7, 7, −3}, {1, 7, 3, −7, −3, 3}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, −7, −5}, {1, 7, 3, −3, −7, −1}, {1, 7, 3, −3, −1, −5}, {1, 7, 3, −1,−7, −5}, {1, 7, 5, −1, 3, −3}, {1, 7, 5, −1, −7, −7}, {1, 7, 5, −1, −7,−3}, {1, −7, 1, 3, −3, 3}, {1, −7, 1, −7, 1, 1}, {1, −7, 3, 1, 7, −1},{1, −7, 3, 1, −7, −5}, {1, −7, 3, 1, −7, −1}, {1, −7, 3, 3, −3, −5}, {1,−7, 3, 5, −3, −5}, {1, −7, 3, −5, −7, −1}, {1, −7, 3, −5, −3, 3}, {1,−7, 3, −3, −3, 3}, {1, −7, 5, 1, −7, −3}, {1, −5, 1, 1, 3, −7}, {1, −5,1, 1, −7, 7}, {1, −5, 1, 3, 3, −7}, {1, −5, 1, 3, −7, 5}, {1, −5, 1, 5,3, 7}, {1, −5, 1, 5, 3, −3}, {1, −5, 1, 5, −7, 3}, {1, −5, 1, 5, −7, 7},{1, −5, 1, 7, 3, −1}, {1, −5, 1, 7, 5, −1}, {1, −5, 1, 7, 7, −7}, {1,−5, 1, 7, 7, −1}, {1, −5, 1, 7, −7, 1}, {1, −5, 1, 7, −7, 5}, {1, −5, 1,7, −1, 1}, {1, −5, 1, −7, 3, 1}, {1, −5, 1, −7, 7, −7}, {1, −5, 1, −7,7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −7, −5, 3}, {1, −5, 1, −3, 3,5}, {1, −5, 1, −1, 3, 7}, {1, −5, 1, −1, 7, 7}, {1, −5, 3, 1, 7, 7}, {1,−5, 3, 5, −5, 3}, {1, −5, 3, 5, −3, 3}, {1, −5, 3, −7, 7, 1}, {1, −5, 3,−7, 7, −1}, {1, −5, 3, −7, −5, 3}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1,−5, −3}, {1, −5, 5, 3, −7, 1}, {1, −5, 5, 3, −7, −3}, {1, −5, 5, 7, 3,−3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −1, 3, 5}, {1, −5, 7, 1, 3, −3},{1, −5, 7, 1, 3, −1}, {1, −5, 7, 1, 5, −1}, {1, −5, −7, 3, 3, −3}, {1,−5, −7, 3, 7, 1}, {1, −5, −7, 3, 7, −3}, {1, −3, 1, 5, −3, 1}, {1, −3,1, 7, 5, −5}, {1, −3, 1, 7, −5, 5}, {1, −3, 1, −7, −5, 5}, {1, −3, 1,−7, −3, 1}, {1, −3, 1, −7, −3, 5}, {1, −3, 1, −5, −3, 7}, {1, −3, 3, 7,−3, 3}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −5, 7}, {1, −3, 3, −7, −3,3}, {1, −1, 1, 7, −1, −7}, {1, −1, 1, −7, 3, −5}, {1, −1, 1, −7, −1, 7},{1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, −5}, and {1, −1, 5, −7, 3, 7};

{1, 1, 5, −5, 3, −3}, {1, 1, 7, −5, 7, −1}, {1, 1, 7, −1, 3, −1}, {1, 1,−5, 3, −1, 3}, {1, 1, −5, 7, −5, 3}, {1, 1, −3, 7, −1, 5}, {1, 3, 7, −5,3, −3}, {1, 3, −1, −7, 1, 5}, {1, 5, 1, −7, 3, 3}, {1, 5, 1, −5, −5, 1},{1, 5, 3, −1, −5, 3}, {1, 5, 5, 1, −5, 3}, {1, 5, 7, 3, −3, 5}, {1, 5,−7, 1, −5, 7}, {1, 5, −7, −5, 7, 1}, {1, 5, −5, 3, −3, −7}, {1, 5, −5,3, −1, −5}, {1, 5, −5, −5, 5, −3}, {1, 5, −3, 3, 3, −3}, {1, 5, −3, 7,3, 5}, {1, 7, 7, 1, −7, 5}, {1, 7, 7, 1, −3, 1}, {1, 7, −5, 7, −1, −7},{1, 7, −5, −7, 5, 1}, {1, 7, −5, −5, 7, 1}, {1, 7, −1, 3, −1, −7}, {1,7, −1, −7, 5, 5}, {1, 7, −1, −5, 7, 5}, {1, −7, 3, 3, −7, −3}, {1, −7,3, −1, 1, 5}, {1, −7, 5, 1, −1, 3}, {1, −7, 5, −7, −1, −1}, {1, −7, −3,1, 3, −1}, {1, −7, −3, −7, 3, 3}, {1, −7, −1, 3, 3, −1}, {1, −7, −1, −1,−7, 5}, {1, −5, 3, 7, −5, −3}, {1, −5, 3, −1, 3, −7}, {1, −5, 7, 7, −5,1}, {1, −5, 7, −7, −3, 1}, {1, −5, 7, −5, 3, −7}, {1, −5, −5, 1, 5, 1},{1, −5, −5, 1, −7, −3}, {1, −3, 1, 7, 7, 1}, {1, −3, 1, −7, −1, −1}, {1,−3, 5, −5, −1, −3}, {1, −3, 5, −1, −1, 5}, {1, −3, 7, 7, −3, 5}, {1, −3,7, −1, 3, 7}, {1, −3, 7, −1, 5, −7}, {1, −3, −7, 1, 7, −5}, {1, −3, −7,7, −5, 1}, {1, −3, −3, 1, 7, −1}, {1, −3, −1, 3, 7, −1}, {1, −1, 3, −7,1, −3}, and {1, −1, −5, 7, −1, 5};

{1, 3, 7, −5, 1, −3}, {1, 3, −7, 5, 1, 5}, {1, 3, −7, −3, 1, −3}, {1, 3,−1, −5, 1, 5}, {1, 5, 1, −3, 3, 5}, {1, 5, 1, −3, 7, 5}, {1, 5, 1, −3,−5, 5}, {1, 5, 1, −3, −1, 5}, {1, 5, 3, −3, −7, 5}, {1, 5, 7, 3, −1, 5},{1, 5, 7, −3, −7, 5}, {1, 5, −7, 3, 1, −3}, {1, 5, −7, 5, 1, 7}, {1, 5,−7, 7, 3, −1}, {1, 5, −7, −5, 1, −3}, {1, 5, −7, −1, 1, −3}, {1, 5, −5,7, 3, 5}, {1, 5, −5, −3, −7, 5}, {1, 5, −1, −5, 7, 5}, {1, 5, −1, −3,−7, 5}, {1, 7, 3, −1, 3, 7}, {1, 7, −7, 5, 1, 5}, {1, 7, −7, −3, 1, −3},{1, 7, −5, −1, 1, −3}, {1, −5, 7, 3, 1, 5}, {1, −5, −7, 5, 1, 5}, {1,−3, 1, 5, 7, −3}, {1, −3, 1, 5, −5, −3}, {1, −3, 3, 5, −7, −3}, {1, −3,−7, 3, 1, 5}, {1, −3, −7, 7, 1, 5}, {1, −3, −7, −5, 1, 5}, {1, −3, −7,−3, 1, −1}, {1, −3, −7, −1, 1, 5}, {1, −3, −5, 5, −7, −3}, {1, −3, −1,3, 7, −3}, {1, −3, −1, 5, −7, −3}, {1, −1, 3, 7, 3, −1}, {1, −1, −7, 5,1, 5}, and {1, −1, −5, 7, 1, 5};

{1, 3, −3, 1, 3, −3}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 3, 7}, {1,3, −3, −7, −5, 5}, {1, 3, −3, −1, 3, −3}, {1, 5, −1, −7, 3, 7}, {1, 7,3, 1, 5, −1}, {1, 7, 3, 1, 7, 5}, {1, 7, 3, 1, −5, −1}, {1, 7, 3, 1, −3,3}, {1, 7, 3, 5, −7, 3}, {1, 7, 3, 5, −1, 3}, {1, 7, 3, 7, 1, 3}, {1, 7,3, −7, 3, 7}, {1, 7, 3, −7, 5, −5}, {1, 7, 3, −7, 7, −3}, {1, 7, 3, −7,−3, 7}, {1, 7, 3, −7, −1, −3}, {1, 7, 3, −3, 1, −5}, {1, 7, 3, −3, 7,−5}, {1, 7, 3, −1, −7, −5}, {1, 7, 5, 1, 7, 5}, {1, 7, 5, −7, −1, −3},{1, 7, 5, −1, −7, −3}, {1, −5, −3, 1, −5, −3}, {1, −5, −3, 7, −5, 5},{1, −5, −3, −7, 3, 5}, {1, −5, −3, −7, 3, 7}, {1, −5, −3, −1, 3, −3},{1, −3, 3, 1, 3, −3}, {1, −3, 3, 1, 5, −1}, {1, −3, 3, 1, −5, −1}, {1,−3, 3, 5, −7, 3}, {1, −3, 3, 5, −1, 3}, {1, −3, 3, 7, −3, −5}, {1, −3,3, −7, 3, 7}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −3, 7}, {1, −3, 3,−3, 7, −5}, {1, −3, 3, −1, 5, 3}, {1, −1, 5, 1, −1, 5}, {1, −1, 5, −7,7, −3}, and {1, −1, 5, −7, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {13, 3, −3, 5, −5},{13, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5,7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5, −1, −7,−3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5, −3},{1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3}, {1, 5,1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1, −7, 5,−3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5, −3},{1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1, 5,3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5, 1,−5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {13, 3, −3, 5, −5},{13, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5,7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5, −1, −7,−3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5, −3},{1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3}, {1, 5,1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1, −7, 5,−3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5, −3},{1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1, 5,3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5, 1,−5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7}; or

{1, 1, −7, 5, −1, 1}, {1, 1, −7, 7, −3, 1}, {1, 1, −7, −5, 5, 1}, {1, 1,−7, −3, 3, 1}, {1, 1, −7, −3, −5, 1}, {1, 1, −7, −1, −3, 1}, {1, 3, 7,1, 5, 1}, {1, 3, −5, 3, 5, 1}, {1, 3, −5, 3, 5, −3}, {1, 3, −5, 7, −7,1}, {1, 3, −5, 7, −5, 5}, {1, 3, −5, 7, −1, 1}, {1, 3, −5, −5, 3, −1},{1, 3, −5, −3, 5, 1}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 1, 1}, {1,3, −1, 7, −7, 1}, {1, 5, 1, −7, −5, −1}, {1, 5, 3, −7, 1, 1}, {1, 5, 7,−1, −5, −1}, {1, 5, −5, −7, 1, 1}, {1, 5, −3, −5, 3, 1}, {1, 5, −1, 3,5, −3}, {1, 5, −1, 3, −3, −1}, {1, 5, −1, 3, −1, 7}, {1, 7, 5, −7, 1,1}, {1, 7, 5, −3, −3, 5}, {1, 7, −5, 3, 3, −5}, {1, −7, 1, 3, −5, 7},{1, −7, 1, 3, −1, 7}, {1, −7, 5, 7, −1, 7}, {1, −7, 5, −7, 3, 7}, {1,−7, 5, −3, −1, 7}, {1, −7, 5, −1, 1, −7}, {1, −7, 7, −3, 1, −7}, {1, −7,7, −1, 3, −5}, {1, −7, 7, −1, −3, 5}, {1, −7, −7, 1, 3, −3}, {1, −7, −7,1, 5, −5}, {1, −7, −7, 1, 7, 5}, {1, −7, −7, 1, −3, 7}, {1, −7, −7, 1,−1, 5}, {1, −7, −5, 3, 5, −3}, {1, −7, −5, 3, −5, −3}, {1, −7, −5, 3,−1, 1}, {1, −7, −5, 3, −1, 7}, {1, −7, −5, 5, 1, −7}, {1, −7, −5, 7, −1,1}, {1, −7, −5, −1, −7, −3}, {1, −7, −3, 3, 1, −7}, {1, −7, −3, 5, 3,−5}, {1, −7, −3, −5, 1, −7}, {1, −7, −1, −3, 1, −7}, {1, −5, 7, −1, −1,7}, {1, −5, −3, 5, 5, −3}, {1, −5, −3, 7, −5, 5}, {1, −5, −1, −7, −5,5}, {1, −5, −1, −7, −3, 7}, {1, −5, −1, −5, 3, 5}, {1, −3, 1, −5, −1,1}, {1, −3, 5, 5, −3, −1}, {1, −3, 5, 7, −1, 1}, {1, −3, 5, 7, −1, 7},{1, −3, 7, −7, 1, 1}, {1, −3, −1, 7, −1, 1}, {1, −1, 3, −5, −5, 3}, {1,−1, 5, −7, 1, 1}, {1, −1, 5, −3, −3, 5}, {1, −1, 7, 5, −3, 1}, {1, −1,7, 7, −1, 3}, and {1, −1, 7, −5, 3, 1};

-   -   a generation unit, configured to generate a first signal based        on the sequence {x_(n)};    -   and a sending unit, configured to send the first signal.

In an embodiment, the set of the sequence {s} includes at least one ofsequences in a second sequence set, and the second sequence set includessome of the sequences in the first sequence set.

In an embodiment:

-   -   the generation unit is further configured to perform discrete        Fourier transform on N elements in the sequence {x_(n)} to        obtain a sequence {f_(n)} including N elements;    -   the generation unit is further configured to map the N elements        in the sequence {f_(n)} to N subcarriers respectively, to obtain        a frequency-domain signal including the N elements;    -   and the generation unit is further configured to generate the        first signal based on the frequency-domain signal.

In an embodiment, the N subcarriers are N consecutive subcarriers, or Nequi-spaced subcarriers.

In an embodiment, the signal processing apparatus further includes afilter unit, configured to: filter the sequence {x_(n)} before thediscrete Fourier transform is performed on the N elements; or filter thesequence {x_(n)} after the discrete Fourier transform is performed onthe N elements.

In an embodiment, the first signal is a reference signal of a secondsignal, and a modulation scheme of the second signal is π/2 binary phaseshift keying BPSK.

A plurality of orthogonal frequency division DMRS ports are supported inthe foregoing process. For example, in a comb-2, two orthogonal DMRSports are supported to occupy different subcarriers. In a comb-4, fourorthogonal DMRS ports are supported to occupy different subcarriers. Tosupport more users, more DMRS orthogonal ports need to be supported on asame frequency-domain resource through code division multiplexing.

Specifically, a sequence used by a DMRS port 0 is represented as {)(0),. . . , Φ(5), Φ(0), . . . , Φ(5)}, and DFT transform is performed on thesequence used by the DMRS port 0. Optionally, IDFT transform isperformed after a sequence obtained after the DFT transform is filtered,to form the DMRS port 0. The DMRS port 0 occupies frequency-domaincombs 1. In an orthogonal manner 1, a DMRS port 2 that occupiesfrequency-domain combs 2 may use a sequence {Φ(0), . . . , Φ(5), −Φ(0),. . . , −Φ(5)}, and DFT transform is performed on the sequence.Optionally, IDFT transform is performed after a sequence obtained afterthe DFT transform is filtered, to form the DMRS port 2.

In an orthogonal manner 2, a DMRS port 2 that occupies frequency-domaincombs 2 may alternatively use a sequence {Φ(0), . . . , Φ(5)}, and DFTtransform is performed on the sequence. Then, a tensor product operation(Kronecker) is performed by using a vector [0 1] to form a sequencehaving a length of 12. For example, {β(0), . . . , β(5)} is a sequenceobtained after the DFT transform is performed on {Φ(0), . . . , Φ(5)}.In this case, the Kronecker operation is [β(0) . . . β(5)]⊗[0 1]=[0 β(0)0 β(1) . . . 0 β(5)]. Optionally, IDFT transform is performed after asequence obtained after the DFT transform is filtered, to form the DMRSport 2.

In an orthogonal manner 3, a DMRS port 2 that occupies frequency-domaincombs 2 may use a sequence [Φ(0), . . . , Φ(5), Φ(0), . . . ,Φ(5)]·[e^(π×j×0/6) e^(π×j×1/6) . . . e^(π×j×11/6) ], and DFT transformis performed on the sequence. Optionally, IDFT transform is performedafter a sequence obtained after the DFT transform is filtered, to formthe DMRS port 2. In the orthogonal manners 1, 2, and 3, orthogonal DMRSports occupying different subcarriers are formed.

In an orthogonal manner 4, a cyclic shift (CS) operation is performed onthe sequence used by the DMRS port 0. In a cyclic shift manner, thesequence is shifted by ¼ of the length of the sequence to the left, toform a sequence of the DMRS port 1. For example, the sequence of theDMRS port 1 is {(3), (4), (5), (o), . . . , (5), (o), (1), (2)}. DFTtransform is performed on the sequence used by the DMRS port 1.Optionally, IDFT transform is performed after a sequence obtained afterthe DFT transform is filtered, to form the DMRS port 1, and the DMRSport 1 occupies the frequency-domain combs 1.

In an orthogonal manner 5, a point multiplication operation is performedon the DMRS port 0 and Walsh code to form the sequence of the DMRSport 1. The Walsh code may be [1 −1 1 −1 1 −1 1 −1 1 −1 1 −1], [1 1 1 −1−1 −1 1 1 1 −1 −1 −1], or [e^(2×π×j×0/6) e^(2×π×j×1/6) . . .e^(2×π×j×11/6)]. For example, if the Walsh code [1 −1 1 −1 1 −1 1 −1 1−1 1 −1] is used, the sequence of the DMRS port 1 is {Φ(0), Φ(1), Φ(2),−Φ(3), −Φ(4), −Φ(5), Φ(0), Φ(1), Φ(2), −D (3), −Φ(4), −(5)}. DFTtransform is performed on the sequence used by the DMRS port 1.Optionally, IDFT transform is performed after a sequence obtained afterthe DFT transform is filtered, to form the DMRS port 1, and the DMRSport 1 occupies the frequency-domain combs 1.

The third sequence set is used in the orthogonal manner 1 to form theDMRS port 2, and used in the orthogonal manner 4 to form the DMRS port 1based on the DMRS port 0 and form a DMRS port 3 based on the DMRS port2.

The fourth sequence set and the fifth sequence set are used in theorthogonal manner 1 to form the DMRS port 2, and used in the orthogonalmanner 5 to form the DMRS port 1 based on the DMRS port 0 and form theDMRS port 3 based on the DMRS port 2.

The sixth sequence set is used in the orthogonal manner 2 to form theDMRS port 2, and used in the orthogonal manner 4 to form the DMRS port 1based on the DMRS port 0 and form the DMRS port 3 based on the DMRS port2.

The seventh sequence set is used in the orthogonal manner 3 to form theDMRS port 2, and used in the orthogonal manner 4 to form the DMRS port 1based on the DMRS port 0 and form the DMRS port 3 based on the DMRS port2.

The eighth sequence set is used in the orthogonal manner 5 to form theDMRS port 2, and used in the orthogonal manner 5 to form the DMRS port 1based on the DMRS port 0 and form the DMRS port 3 based on the DMRS port2.

The following describes another embodiment of the present disclosure.The embodiment relates to a sequence-based signal processing method,including:

determining a sequence {x_(n)}, where X) is an element in the sequence{x_(n)}, the sequence {x_(n)} is a sequence satisfying a presetcondition, and the preset condition is:

the preset condition is x_(n)=y_((n+M)mod K), where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, j=√{squareroot over (−1)}, and a set of sequence {s_(n)} including an elements_(n) includes at least one of sequences in a first sequence set; and

the sequences included in the first sequence set include:

{1, 1, 3, −7, 5, −3}, {1, 1, 5, −7, 3, 5}, {1, 1, 5, −5, −3, 7}, {1, 1,−7, −5, 5, −7}, {1, 1, −7, −3, 7, −7}, {1, 3, 1, 7, −1, −5}, {1, 3, 1,−7, −3, 7}, {1, 3, 1, −7, −1, −5}, {1, 3, 3, 7, −1, −5}, {1, 5, 1, 1,−5, −3}, {1, 5, 1, 3, −5, 5}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 3, −3, 1},{1, 5, 1, 3, −1, −7}, {1, 5, 1, 5, 3, −7}, {1, 5, 1, 5, 3, −5}, {1, 5,1, 5, 7, 7}, {1, 5, 1, 5, −5, 3}, {1, 5, 1, 5, −3, 3}, {1, 5, 1, 5, −1,3}, {1, 5, 1, 5, −1, −1}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, −5, 5}, {1,5, 1, −5, 3, 5}, {1, 5, 1, −5, −7, −1}, {1, 5, 1, −5, −5, −3}, {1, 5, 1,−5, −3, 1}, {1, 5, 1, −5, −1, 1}, {1, 5, 1, −5, −1, 5}, {1, 5, 1, −5,−1, −1}, {1, 5, 1, −3, 1, 7}, {1, 5, 1, −3, 1, −5}, {1, 5, 1, −3, 7,−7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1, 5, 1, −1, 3, −5},{1, 5, 1, −1, 5, −7}, {1, 5, 1, −1, −7, −3}, {1, 5, 1, −1, −5, −3}, {1,5, 3, −3, −7, −5}, {1, 5, 3, −3, −7, −1}, {1, 5, 3, −3, −1, −7}, {1, 5,3, −1, 5, −7}, {1, 5, 3, −1, −5, −3}, {1, 5, 5, 1, 3, −3}, {1, 5, 5, −1,−7, −5}, {1, 7, 1, 1, 1, −5}, {1, 7, 1, 1, −7, −7}, {1, 7, 1, 1, −5,−5}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, −7, 1, 1}, {1,7, 1, −7, −7, −7}, {1, 7, 1, −5, 1, 1}, {1, 7, 1, −5, −5, 1}, {1, 7, 1,−5, −3, 1}, {1, 7, 1, −5, −1, 1}, {1, 7, 1, −5, −1, −1}, {1, 7, 1, −1,5, 7}, {1, 7, 3, 1, 5, −3}, {1, 7, 3, 1, −5, −5}, {1, 7, 3, 5, −5, −7},{1, 7, 3, −7, 7, −1}, {1, 7, 3, −7, −5, 3}, {1, 7, 3, −5, −7, −1}, {1,7, 3, −3, −5, 1}, {1, 7, 3, −3, −5, −1}, {1, 7, 3, −3, −3, −3}, {1, 7,3, −1, −5, −3}, {1, 7, 5, 1, −5, −5}, {1, 7, 5, 1, −5, −3}, {1, 7, 5,−5, 3, −1}, {1, 7, 5, −5, −3, −7}, {1, 7, 5, −3, −7, 1}, {1, 7, 5, −1,−5, −5}, {1, 7, 5, −1, −5, −3}, {1, −7, 1, −5, 1, 1}, {1, −7, 3, 3, −5,−5}, {1, −7, 3, 5, −1, −3}, {1, −7, 3, −5, 1, 1}, {1, −7, 3, −5, −5, 1},{1, −7, 3, −5, −5, −5}, {1, −7, 5, −3, −5, 1}, {1, −5, 1, 1, 3, 7}, {1,−5, 1, 1, 5, 7}, {1, −5, 1, 1, 7, 7}, {1, −5, 1, 3, 3, 7}, {1, −5, 1, 7,5, −1}, {1, −5, 1, 7, 7, 1}, {1, −5, 1, −7, −7, 1}, {1, −5, 1, −7, −7,−7}, {1, −5, 3, −7, −7, 1}, {1, −5, 5, 3, −5, −3}, {1, −5, 5, 3, −5,−1}, {1, −5, 5, 5, −5, −3}, {1, −5, 5, 5, −5, −1}, {1, −5, 5, 7, −5, 1},{1, −5, 5, 7, −5, 3}, {1, −5, 5, −7, −5, 1}, {1, −5, 5, −7, −5, 3}, {1,−5, 7, 3, 5, −3}, {1, −5, −7, 3, 5, −3}, {1, −5, −7, 3, 5, −1}, {1, −5,−7, 3, 7, −1}, {1, −3, 1, 1, 3, 7}, {1, −3, 1, 1, 5, 7}, {1, −3, 1, 1,5, −1}, {1, −3, 13, 3, 7}, {1, −3, 1, 3, −7, 7}, {1, −3, 1, 5, 7, 1},{1, −3, 1, 5, 7, 3}, {1, −3, 1, 5, 7, 7}, {1, −3, 1, 5, −7, 3}, {1, −3,1, 7, −5, 5}, {1, −3, 1, 7, −1, 3}, {1, −3, 1, −7, 3, −1}, {1, −3, 1,−7, 7, −1}, {1, −3, 1, −7, −5, 5}, {1, −3, 1, −7, −3, 3}, {1, −3, 1, −5,7, −1}, {1, −3, 3, 3, −7, 7}, {1, −3, 3, 5, −5, −7}, {1, −3, 3, 7, 7,7}, {1, −3, 3, 7, −7, 5}, {1, −3, 3, −7, −7, 3}, {1, −3, 3, −5, −7, −1},{1, −3, 7, −5, 3, 5}, {1, −1, 1, 7, 3, −7}, {1, −1, 1, 7, 3, −5}, {1,−1, 1, −5, 5, −7}, {1, −1, 3, −7, −5, 7}, {1, −1, 5, −7, −5, 5}, {1, −1,5, −7, −5, 7}, {1, −1, 5, −5, −5, 5}, and {1, −1, 5, −5, −5, 7};

{1, 1, 5, −7, 3, 7}, {1, 1, 5, −7, 3, −3}, {1, 1, 5, −1, 3, 7}, {1, 1,5, −1, −7, −3}, {1, 3, 1, 7, −1, −7}, {1, 3, 1, −7, 1, −5}, {1, 3, 1,−7, 3, −5}, {1, 3, 1, −7, −1, −7}, {1, 3, 1, −5, 1, −7}, {1, 3, 1, −5,3, −7}, {1, 3, 5, −7, 3, 7}, {1, 3, 5, −1, 3, 7}, {1, 3, 5, −1, 3, −3},{1, 3, 5, −1, −5, 7}, {1, 3, 7, 1, 5, 7}, {1, 3, 7, −7, 3, 7}, {1, 3, 7,−5, 5, 7}, {1, 5, 1, 1, 5, −7}, {1, 5, 1, 1, 5, −3}, {1, 5, 1, 5, 5,−7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1,5, 1, 5, −3, 1}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 5, −1, 3}, {1, 5, 1, 7,−3, −5}, {1, 5, 1, −7, 1, −3}, {1, 5, 1, −7, −3, 5}, {1, 5, 1, −5, 5,7}, {1, 5, 1, −5, −3, 7}, {1, 5, 1, −3, 1, −7}, {1, 5, 1, −3, 5, −7},{1, 5, 1, −3, 7, −7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1,5, 3, 1, 5, −7}, {1, 5, 3, 1, 5, −3}, {1, 5, 3, 7, −3, −5}, {1, 5, 3, 7,−1, 3}, {1, 5, 3, −7, −3, 7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −1, −5,−3}, {1, 5, 5, −1, 3, 7}, {1, 5, 5, −1, 3, −3}, {1, 5, 7, 1, 3, −3}, {1,5, −7, −3, 7, 7}, {1, 7, 1, 1, 3, −5}, {1, 7, 1, 1, −7, −5}, {1, 7, 1,1, −1, −7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −5,−5}, {1, 7, 1, 3, −1, −5}, {1, 7, 1, 5, −1, −3}, {1, 7, 1, 7, −7, −7},{1, 7, 1, 7, −1, −1}, {1, 7, 1, −7, 1, −1}, {1, 7, 1, −7, −5, −5}, {1,7, 1, −7, −1, 1}, {1, 7, 1, −7, −1, −1}, {1, 7, 1, −5, −7, 1}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −5, −5, 3}, {1, 7, 1, −5, −1, 3}, {1, 7, 1, −5,−1, −3}, {1, 7, 1, −3, −7, −5}, {1, 7, 1, −3, −7, −1}, {1, 7, 1, −3, −1,5}, {1, 7, 1, −1, 1, −7}, {1, 7, 1, −1, 7, −7}, {1, 7, 1, −1, −7, −3},{1, 7, 3, 1, 7, −5}, {1, 7, 3, 1, 7, −3}, {1, 7, 3, 5, −1, −5}, {1, 7,3, −7, 7, −3}, {1, 7, 3, −7, −3, 3}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, −7, −5}, {1, 7, 3, −3, −7, −1}, {1, 7, 3, −3, −1, −5}, {1, 7, 3, −1,−7, −5}, {1, 7, 5, −1, 3, −3}, {1, 7, 5, −1, −7, −7}, {1, 7, 5, −1, −7,−3}, {1, −7, 1, 3, −3, 3}, {1, −7, 1, −7, 1, 1}, {1, −7, 3, 1, 7, −1},{1, −7, 3, 1, −7, −5}, {1, −7, 3, 1, −7, −1}, {1, −7, 3, 3, −3, −5}, {1,−7, 3, 5, −3, −5}, {1, −7, 3, −5, −7, −1}, {1, −7, 3, −5, −3, 3}, {1,−7, 3, −3, −3, 3}, {1, −7, 5, 1, −7, −3}, {1, −5, 1, 1, 3, −7}, {1, −5,1, 1, −7, 7}, {1, −5, 1, 3, 3, −7}, {1, −5, 1, 3, −7, 5}, {1, −5, 1, 5,3, 7}, {1, −5, 1, 5, 3, −3}, {1, −5, 1, 5, −7, 3}, {1, −5, 1, 5, −7, 7},{1, −5, 1, 7, 3, −1}, {1, −5, 1, 7, 5, −1}, {1, −5, 1, 7, 7, −7}, {1,−5, 1, 7, 7, −1}, {1, −5, 1, 7, −7, 1}, {1, −5, 1, 7, −7, 5}, {1, −5, 1,7, −1, 1}, {1, −5, 1, −7, 3, 1}, {1, −5, 1, −7, 7, −7}, {1, −5, 1, −7,7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −7, −5, 3}, {1, −5, 1, −3, 3,5}, {1, −5, 1, −1, 3, 7}, {1, −5, 1, −1, 7, 7}, {1, −5, 3, 1, 7, 7}, {1,−5, 3, 5, −5, 3}, {1, −5, 3, 5, −3, 3}, {1, −5, 3, −7, 7, 1}, {1, −5, 3,−7, 7, −1}, {1, −5, 3, −7, −5, 3}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1,−5, −3}, {1, −5, 5, 3, −7, 1}, {1, −5, 5, 3, −7, −3}, {1, −5, 5, 7, 3,−3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −1, 3, 5}, {1, −5, 7, 1, 3, −3},{1, −5, 7, 1, 3, −1}, {1, −5, 7, 1, 5, −1}, {1, −5, −7, 3, 3, −3}, {1,−5, −7, 3, 7, 1}, {1, −5, −7, 3, 7, −3}, {1, −3, 1, 5, −3, 1}, {1, −3,1, 7, 5, −5}, {1, −3, 1, 7, −5, 5}, {1, −3, 1, −7, −5, 5}, {1, −3, 1,−7, −3, 1}, {1, −3, 1, −7, −3, 5}, {1, −3, 1, −5, −3, 7}, {1, −3, 3, 7,−3, 3}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −5, 7}, {1, −3, 3, −7, −3,3}, {1, −1, 1, 7, −1, −7}, {1, −1, 1, −7, 3, −5}, {1, −1, 1, −7, −1, 7},{1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, −5}, and {1, −1, 5, −7, 3, 7};

{1, 1, 5, −5, 3, −3}, {1, 1, 7, −5, 7, −1}, {1, 1, 7, −1, 3, −1}, {1, 1,−5, 3, −1, 3}, {1, 1, −5, 7, −5, 3}, {1, 1, −3, 7, −1, 5}, {1, 3, 7, −5,3, −3}, {1, 3, −1, −7, 1, 5}, {1, 5, 1, −7, 3, 3}, {1, 5, 1, −5, −5, 1},{1, 5, 3, −1, −5, 3}, {1, 5, 5, 1, −5, 3}, {1, 5, 7, 3, −3, 5}, {1, 5,−7, 1, −5, 7}, {1, 5, −7, −5, 7, 1}, {1, 5, −5, 3, −3, −7}, {1, 5, −5,3, −1, −5}, {1, 5, −5, −5, 5, −3}, {1, 5, −3, 3, 3, −3}, {1, 5, −3, 7,3, 5}, {1, 7, 7, 1, −7, 5}, {1, 7, 7, 1, −3, 1}, {1, 7, −5, 7, −1, −7},{1, 7, −5, −7, 5, 1}, {1, 7, −5, −5, 7, 1}, {1, 7, −1, 3, −1, −7}, {1,7, −1, −7, 5, 5}, {1, 7, −1, −5, 7, 5}, {1, −7, 3, 3, −7, −3}, {1, −7,3, −1, 1, 5}, {1, −7, 5, 1, −1, 3}, {1, −7, 5, −7, −1, −1}, {1, −7, −3,1, 3, −1}, {1, −7, −3, −7, 3, 3}, {1, −7, −1, 3, 3, −1}, {1, −7, −1, −1,−7, 5}, {1, −5, 3, 7, −5, −3}, {1, −5, 3, −1, 3, −7}, {1, −5, 7, 7, −5,1}, {1, −5, 7, −7, −3, 1}, {1, −5, 7, −5, 3, −7}, {1, −5, −5, 1, 5, 1},{1, −5, −5, 1, −7, −3}, {1, −3, 1, 7, 7, 1}, {1, −3, 1, −7, −1, −1}, {1,−3, 5, −5, −1, −3}, {1, −3, 5, −1, −1, 5}, {1, −3, 7, 7, −3, 5}, {1, −3,7, −1, 3, 7}, {1, −3, 7, −1, 5, −7}, {1, −3, −7, 1, 7, −5}, {1, −3, −7,7, −5, 1}, {1, −3, −3, 1, 7, −1}, {1, −3, −1, 3, 7, −1}, {1, −1, 3, −7,1, −3}, and {1, −1, −5, 7, −1, 5};

{1, 3, 7, −5, 1, −3}, {1, 3, −7, 5, 1, 5}, {1, 3, −7, −3, 1, −3}, {1, 3,−1, −5, 1, 5}, {1, 5, 1, −3, 3, 5}, {1, 5, 1, −3, 7, 5}, {1, 5, 1, −3,−5, 5}, {1, 5, 1, −3, −1, 5}, {1, 5, 3, −3, −7, 5}, {1, 5, 7, 3, −1, 5},{1, 5, 7, −3, −7, 5}, {1, 5, −7, 3, 1, −3}, {1, 5, −7, 5, 1, 7}, {1, 5,−7, 7, 3, −1}, {1, 5, −7, −5, 1, −3}, {1, 5, −7, −1, 1, −3}, {1, 5, −5,7, 3, 5}, {1, 5, −5, −3, −7, 5}, {1, 5, −1, −5, 7, 5}, {1, 5, −1, −3,−7, 5}, {1, 7, 3, −1, 3, 7}, {1, 7, −7, 5, 1, 5}, {1, 7, −7, −3, 1, −3},{1, 7, −5, −1, 1, −3}, {1, −5, 7, 3, 1, 5}, {1, −5, −7, 5, 1, 5}, {1,−3, 1, 5, 7, −3}, {1, −3, 1, 5, −5, −3}, {1, −3, 3, 5, −7, −3}, {1, −3,−7, 3, 1, 5}, {1, −3, −7, 7, 1, 5}, {1, −3, −7, −5, 1, 5}, {1, −3, −7,−3, 1, −1}, {1, −3, −7, −1, 1, 5}, {1, −3, −5, 5, −7, −3}, {1, −3, −1,3, 7, −3}, {1, −3, −1, 5, −7, −3}, {1, −1, 3, 7, 3, −1}, {1, −1, −7, 5,1, 5}, and {1, −1, −5, 7, 1, 5};

{1, 3, −3, 1, 3, −3}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 3, 7}, {1,3, −3, −7, −5, 5}, {1, 3, −3, −1, 3, −3}, {1, 5, −1, −7, 3, 7}, {1, 7,3, 1, 5, −1}, {1, 7, 3, 1, 7, 5}, {1, 7, 3, 1, −5, −1}, {1, 7, 3, 1, −3,3}, {1, 7, 3, 5, −7, 3}, {1, 7, 3, 5, −1, 3}, {1, 7, 3, 7, 1, 3}, {1, 7,3, −7, 3, 7}, {1, 7, 3, −7, 5, −5}, {1, 7, 3, −7, 7, −3}, {1, 7, 3, −7,−3, 7}, {1, 7, 3, −7, −1, −3}, {1, 7, 3, −3, 1, −5}, {1, 7, 3, −3, 7,−5}, {1, 7, 3, −1, −7, −5}, {1, 7, 5, 1, 7, 5}, {1, 7, 5, −7, −1, −3},{1, 7, 5, −1, −7, −3}, {1, −5, −3, 1, −5, −3}, {1, −5, −3, 7, −5, 5},{1, −5, −3, −7, 3, 5}, {1, −5, −3, −7, 3, 7}, {1, −5, −3, −1, 3, −3},{1, −3, 3, 1, 3, −3}, {1, −3, 3, 1, 5, −1}, {1, −3, 3, 1, −5, −1}, {1,−3, 3, 5, −7, 3}, {1, −3, 3, 5, −1, 3}, {1, −3, 3, 7, −3, −5}, {1, −3,3, −7, 3, 7}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −3, 7}, {1, −3, 3,−3, 7, −5}, {1, −3, 3, −1, 5, 3}, {1, −1, 5, 1, −1, 5}, {1, −1, 5, −7,7, −3}, and {1, −1, 5, −7, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {13, 3, −3, 5, −5},{13, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5,7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5, −1, −7,−3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5, −3},{1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3}, {1, 5,1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1, −7, 5,−3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5, −3},{1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1, 5,3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5, 1,−5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {13, 3, −3, 5, −5},{13, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5,7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5, −1, −7,−3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5, −3},{1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3}, {1, 5,1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1, −7, 5,−3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5, −3},{1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1, 5,3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5, 1,−5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7}; or

{1, 1, −7, 5, −1, 1}, {1, 1, −7, 7, −3, 1}, {1, 1, −7, −5, 5, 1}, {1, 1,−7, −3, 3, 1}, {1, 1, −7, −3, −5, 1}, {1, 1, −7, −1, −3, 1}, {1, 3, 7,1, 5, 1}, {1, 3, −5, 3, 5, 1}, {1, 3, −5, 3, 5, −3}, {1, 3, −5, 7, −7,1}, {1, 3, −5, 7, −5, 5}, {1, 3, −5, 7, −1, 1}, {1, 3, −5, −5, 3, −1},{1, 3, −5, −3, 5, 1}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 1, 1}, {1,3, −1, 7, −7, 1}, {1, 5, 1, −7, −5, −1}, {1, 5, 3, −7, 1, 1}, {1, 5, 7,−1, −5, −1}, {1, 5, −5, −7, 1, 1}, {1, 5, −3, −5, 3, 1}, {1, 5, −1, 3,5, −3}, {1, 5, −1, 3, −3, −1}, {1, 5, −1, 3, −1, 7}, {1, 7, 5, −7, 1,1}, {1, 7, 5, −3, −3, 5}, {1, 7, −5, 3, 3, −5}, {1, −7, 1, 3, −5, 7},{1, −7, 1, 3, −1, 7}, {1, −7, 5, 7, −1, 7}, {1, −7, 5, −7, 3, 7}, {1,−7, 5, −3, −1, 7}, {1, −7, 5, −1, 1, −7}, {1, −7, 7, −3, 1, −7}, {1, −7,7, −1, 3, −5}, {1, −7, 7, −1, −3, 5}, {1, −7, −7, 1, 3, −3}, {1, −7, −7,1, 5, −5}, {1, −7, −7, 1, 7, 5}, {1, −7, −7, 1, −3, 7}, {1, −7, −7, 1,−1, 5}, {1, −7, −5, 3, 5, −3}, {1, −7, −5, 3, −5, −3}, {1, −7, −5, 3,−1, 1}, {1, −7, −5, 3, −1, 7}, {1, −7, −5, 5, 1, −7}, {1, −7, −5, 7, −1,1}, {1, −7, −5, −1, −7, −3}, {1, −7, −3, 3, 1, −7}, {1, −7, −3, 5, 3,−5}, {1, −7, −3, −5, 1, −7}, {1, −7, −1, −3, 1, −7}, {1, −5, 7, −1, −1,7}, {1, −5, −3, 5, 5, −3}, {1, −5, −3, 7, −5, 5}, {1, −5, −1, −7, −5,5}, {1, −5, −1, −7, −3, 7}, {1, −5, −1, −5, 3, 5}, {1, −3, 1, −5, −1,1}, {1, −3, 5, 5, −3, −1}, {1, −3, 5, 7, −1, 1}, {1, −3, 5, 7, −1, 7},{1, −3, 7, −7, 1, 1}, {1, −3, −1, 7, −1, 1}, {1, −1, 3, −5, −5, 3}, {1,−1, 5, −7, 1, 1}, {1, −1, 5, −3, −3, 5}, {1, −1, 7, 5, −3, 1}, {1, −1,7, 7, −1, 3}, and {1, −1, 7, −5, 3, 1};

generating a first signal based on the sequence {x_(n)}; and

sending the first signal.

It should be understood that, after the sequence {x_(n)} is generated,the sequence may further be processed according to some or all of stepsS301 to S304 in the foregoing embodiment. The terminal device mayalternatively be another network device.

In an embodiment, the set of the sequence {s_(n)} includes at least oneof sequences in a second sequence set, and the second sequence setincludes some of the sequences in the first sequence set.

In an embodiment, the generating a first signal based on the sequence{x_(n)} includes:

performing discrete Fourier transform on N elements in the sequence{x_(n)} to obtain a sequence {f_(n)} including N elements;

mapping the N elements in the sequence {f_(n)} to N subcarriersrespectively, to obtain a frequency-domain signal including the Nelements; and

generating the first signal based on the frequency-domain signal.

In an embodiment, the N subcarriers are N consecutive subcarriers, or Nequi-spaced subcarriers.

In an embodiment, before the performing discrete Fourier transform on Nelements in the sequence {x_(n)}, the first signal processing methodfurther includes: filtering the sequence {x_(n)}; or

after the performing discrete Fourier transform on N elements in thesequence {x_(n)}, the first signal processing method further includes:filtering the sequence {x_(n)}.

In an embodiment, the first signal is a reference signal of a secondsignal, and a modulation scheme of the second signal is π/2 binary phaseshift keying BPSK.

The following describes another embodiment of the present disclosure.The embodiment relates to a sequence-based signal processing apparatus,including:

a determining unit, configured to determine a sequence {x_(n)}, wherex_(n) is an element in the sequence {x_(n)}, the sequence {x_(n)} is asequence satisfying a preset condition, and the preset condition is:

the preset condition is x_(n)=y_((n+M)mod K), where

${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$

M∈{0, 1, 2, . . . , 5}, K=6, A is a non-zero complex number, j=√{squareroot over (−1)}, and a set of sequence {s_(n)} including an elements_(n) includes at least one of sequences in a first sequence set; and

the sequences included in the first sequence set include:

{1, 1, 3, −7, 5, −3}, {1, 1, 5, −7, 3, 5}, {1, 1, 5, −5, −3, 7}, {1, 1,−7, −5, 5, −7}, {1, 1, −7, −3, 7, −7}, {1, 3, 1, 7, −1, −5}, {1, 3, 1,−7, −3, 7}, {1, 3, 1, −7, −1, −5}, {1, 3, 3, 7, −1, −5}, {1, 5, 1, 1,−5, −3}, {1, 5, 1, 3, −5, 5}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 3, −3, 1},{1, 5, 1, 3, −1, −7}, {1, 5, 1, 5, 3, −7}, {1, 5, 1, 5, 3, −5}, {1, 5,1, 5, 7, 7}, {1, 5, 1, 5, −5, 3}, {1, 5, 1, 5, −3, 3}, {1, 5, 1, 5, −1,3}, {1, 5, 1, 5, −1, −1}, {1, 5, 1, 7, 3, −3}, {1, 5, 1, 7, −5, 5}, {1,5, 1, −5, 3, 5}, {1, 5, 1, −5, −7, −1}, {1, 5, 1, −5, −5, −3}, {1, 5, 1,−5, −3, 1}, {1, 5, 1, −5, −1, 1}, {1, 5, 1, −5, −1, 5}, {1, 5, 1, −5,−1, −1}, {1, 5, 1, −3, 1, 7}, {1, 5, 1, −3, 1, −5}, {1, 5, 1, −3, 7,−7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1, 5, 1, −1, 3, −5},{1, 5, 1, −1, 5, −7}, {1, 5, 1, −1, −7, −3}, {1, 5, 1, −1, −5, −3}, {1,5, 3, −3, −7, −5}, {1, 5, 3, −3, −7, −1}, {1, 5, 3, −3, −1, −7}, {1, 5,3, −1, 5, −7}, {1, 5, 3, −1, −5, −3}, {1, 5, 5, 1, 3, −3}, {1, 5, 5, −1,−7, −5}, {1, 7, 1, 1, 1, −5}, {1, 7, 1, 1, −7, −7}, {1, 7, 1, 1, −5,−5}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, −7, 1, 1}, {1,7, 1, −7, −7, −7}, {1, 7, 1, −5, 1, 1}, {1, 7, 1, −5, −5, 1}, {1, 7, 1,−5, −3, 1}, {1, 7, 1, −5, −1, 1}, {1, 7, 1, −5, −1, −1}, {1, 7, 1, −1,5, 7}, {1, 7, 3, 1, 5, −3}, {1, 7, 3, 1, −5, −5}, {1, 7, 3, 5, −5, −7},{1, 7, 3, −7, 7, −1}, {1, 7, 3, −7, −5, 3}, {1, 7, 3, −5, −7, −1}, {1,7, 3, −3, −5, 1}, {1, 7, 3, −3, −5, −1}, {1, 7, 3, −3, −3, −3}, {1, 7,3, −1, −5, −3}, {1, 7, 5, 1, −5, −5}, {1, 7, 5, 1, −5, −3}, {1, 7, 5,−5, 3, −1}, {1, 7, 5, −5, −3, −7}, {1, 7, 5, −3, −7, 1}, {1, 7, 5, −1,−5, −5}, {1, 7, 5, −1, −5, −3}, {1, −7, 1, −5, 1, 1}, {1, −7, 3, 3, −5,−5}, {1, −7, 3, 5, −1, −3}, {1, −7, 3, −5, 1, 1}, {1, −7, 3, −5, −5, 1},{1, −7, 3, −5, −5, −5}, {1, −7, 5, −3, −5, 1}, {1, −5, 1, 1, 3, 7}, {1,−5, 1, 1, 5, 7}, {1, −5, 1, 1, 7, 7}, {1, −5, 1, 3, 3, 7}, {1, −5, 1, 7,5, −1}, {1, −5, 1, 7, 7, 1}, {1, −5, 1, −7, −7, 1}, {1, −5, 1, −7, −7,−7}, {1, −5, 3, −7, −7, 1}, {1, −5, 5, 3, −5, −3}, {1, −5, 5, 3, −5,−1}, {1, −5, 5, 5, −5, −3}, {1, −5, 5, 5, −5, −1}, {1, −5, 5, 7, −5, 1},{1, −5, 5, 7, −5, 3}, {1, −5, 5, −7, −5, 1}, {1, −5, 5, −7, −5, 3}, {1,−5, 7, 3, 5, −3}, {1, −5, −7, 3, 5, −3}, {1, −5, −7, 3, 5, −1}, {1, −5,−7, 3, 7, −1}, {1, −3, 1, 1, 3, 7}, {1, −3, 1, 1, 5, 7}, {1, −3, 1, 1,5, −1}, {1, −3, 1, 3, 3, 7}, {1, −3, 1, 3, −7, 7}, {1, −3, 1, 5, 7, 1},{1, −3, 1, 5, 7, 3}, {1, −3, 1, 5, 7, 7}, {1, −3, 1, 5, −7, 3}, {1, −3,1, 7, −5, 5}, {1, −3, 1, 7, −1, 3}, {1, −3, 1, −7, 3, −1}, {1, −3, 1,−7, 7, −1}, {1, −3, 1, −7, −5, 5}, {1, −3, 1, −7, −3, 3}, {1, −3, 1, −5,7, −1}, {1, −3, 3, 3, −7, 7}, {1, −3, 3, 5, −5, −7}, {1, −3, 3, 7, 7,7}, {1, −3, 3, 7, −7, 5}, {1, −3, 3, −7, −7, 3}, {1, −3, 3, −5, −7, −1},{1, −3, 7, −5, 3, 5}, {1, −1, 1, 7, 3, −7}, {1, −1, 1, 7, 3, −5}, {1,−1, 1, −5, 5, −7}, {1, −1, 3, −7, −5, 7}, {1, −1, 5, −7, −5, 5}, {1, −1,5, −7, −5, 7}, {1, −1, 5, −5, −5, 5}, and {1, −1, 5, −5, −5, 7};

{1, 1, 5, −7, 3, 7}, {1, 1, 5, −7, 3, −3}, {1, 1, 5, −1, 3, 7}, {1, 1,5, −1, −7, −3}, {1, 3, 1, 7, −1, −7}, {1, 3, 1, −7, 1, −5}, {1, 3, 1,−7, 3, −5}, {1, 3, 1, −7, −1, −7}, {1, 3, 1, −5, 1, −7}, {1, 3, 1, −5,3, −7}, {1, 3, 5, −7, 3, 7}, {1, 3, 5, −1, 3, 7}, {1, 3, 5, −1, 3, −3},{1, 3, 5, −1, −5, 7}, {1, 3, 7, 1, 5, 7}, {1, 3, 7, −7, 3, 7}, {1, 3, 7,−5, 5, 7}, {1, 5, 1, 1, 5, −7}, {1, 5, 1, 1, 5, −3}, {1, 5, 1, 5, 5,−7}, {1, 5, 1, 5, 5, −3}, {1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1,5, 1, 5, −3, 1}, {1, 5, 1, 5, −3, −3}, {1, 5, 1, 5, −1, 3}, {1, 5, 1, 7,−3, −5}, {1, 5, 1, −7, 1, −3}, {1, 5, 1, −7, −3, 5}, {1, 5, 1, −5, 5,7}, {1, 5, 1, −5, −3, 7}, {1, 5, 1, −3, 1, −7}, {1, 5, 1, −3, 5, −7},{1, 5, 1, −3, 7, −7}, {1, 5, 1, −3, 7, −5}, {1, 5, 1, −3, −5, −1}, {1,5, 3, 1, 5, −7}, {1, 5, 3, 1, 5, −3}, {1, 5, 3, 7, −3, −5}, {1, 5, 3, 7,−1, 3}, {1, 5, 3, −7, −3, 7}, {1, 5, 3, −3, 7, −5}, {1, 5, 3, −1, −5,−3}, {1, 5, 5, −1, 3, 7}, {1, 5, 5, −1, 3, −3}, {1, 5, 7, 1, 3, −3}, {1,5, −7, −3, 7, 7}, {1, 7, 1, 1, 3, −5}, {1, 7, 1, 1, −7, −5}, {1, 7, 1,1, −1, −7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5, −7}, {1, 7, 1, 3, −5,−5}, {1, 7, 1, 3, −1, −5}, {1, 7, 1, 5, −1, −3}, {1, 7, 1, 7, −7, −7},{1, 7, 1, 7, −1, −1}, {1, 7, 1, −7, 1, −1}, {1, 7, 1, −7, −5, −5}, {1,7, 1, −7, −1, 1}, {1, 7, 1, −7, −1, −1}, {1, 7, 1, −5, −7, 1}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −5, −5, 3}, {1, 7, 1, −5, −1, 3}, {1, 7, 1, −5,−1, −3}, {1, 7, 1, −3, −7, −5}, {1, 7, 1, −3, −7, −1}, {1, 7, 1, −3, −1,5}, {1, 7, 1, −1, 1, −7}, {1, 7, 1, −1, 7, −7}, {1, 7, 1, −1, −7, −3},{1, 7, 3, 1, 7, −5}, {1, 7, 3, 1, 7, −3}, {1, 7, 3, 5, −1, −5}, {1, 7,3, −7, 7, −3}, {1, 7, 3, −7, −3, 3}, {1, 7, 3, −7, −1, −3}, {1, 7, 3,−3, −7, −5}, {1, 7, 3, −3, −7, −1}, {1, 7, 3, −3, −1, −5}, {1, 7, 3, −1,−7, −5}, {1, 7, 5, −1, 3, −3}, {1, 7, 5, −1, −7, −7}, {1, 7, 5, −1, −7,−3}, {1, −7, 1, 3, −3, 3}, {1, −7, 1, −7, 1, 1}, {1, −7, 3, 1, 7, −1},{1, −7, 3, 1, −7, −5}, {1, −7, 3, 1, −7, −1}, {1, −7, 3, 3, −3, −5}, {1,−7, 3, 5, −3, −5}, {1, −7, 3, −5, −7, −1}, {1, −7, 3, −5, −3, 3}, {1,−7, 3, −3, −3, 3}, {1, −7, 5, 1, −7, −3}, {1, −5, 1, 1, 3, −7}, {1, −5,1, 1, −7, 7}, {1, −5, 1, 3, 3, −7}, {1, −5, 1, 3, −7, 5}, {1, −5, 1, 5,3, 7}, {1, −5, 1, 5, 3, −3}, {1, −5, 1, 5, −7, 3}, {1, −5, 1, 5, −7, 7},{1, −5, 1, 7, 3, −1}, {1, −5, 1, 7, 5, −1}, {1, −5, 1, 7, 7, −7}, {1,−5, 1, 7, 7, −1}, {1, −5, 1, 7, −7, 1}, {1, −5, 1, 7, −7, 5}, {1, −5, 1,7, −1, 1}, {1, −5, 1, −7, 3, 1}, {1, −5, 1, −7, 7, −7}, {1, −5, 1, −7,7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −7, −5, 3}, {1, −5, 1, −3, 3,5}, {1, −5, 1, −1, 3, 7}, {1, −5, 1, −1, 7, 7}, {1, −5, 3, 1, 7, 7}, {1,−5, 3, 5, −5, 3}, {1, −5, 3, 5, −3, 3}, {1, −5, 3, −7, 7, 1}, {1, −5, 3,−7, 7, −1}, {1, −5, 3, −7, −5, 3}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1,−5, −3}, {1, −5, 5, 3, −7, 1}, {1, −5, 5, 3, −7, −3}, {1, −5, 5, 7, 3,−3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −1, 3, 5}, {1, −5, 7, 1, 3, −3},{1, −5, 7, 1, 3, −1}, {1, −5, 7, 1, 5, −1}, {1, −5, −7, 3, 3, −3}, {1,−5, −7, 3, 7, 1}, {1, −5, −7, 3, 7, −3}, {1, −3, 1, 5, −3, 1}, {1, −3,1, 7, 5, −5}, {1, −3, 1, 7, −5, 5}, {1, −3, 1, −7, −5, 5}, {1, −3, 1,−7, −3, 1}, {1, −3, 1, −7, −3, 5}, {1, −3, 1, −5, −3, 7}, {1, −3, 3, 7,−3, 3}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −5, 7}, {1, −3, 3, −7, −3,3}, {1, −1, 1, 7, −1, −7}, {1, −1, 1, −7, 3, −5}, {1, −1, 1, −7, −1, 7},{1, −1, 3, −7, −3, 7}, {1, −1, 3, −3, 7, −5}, and {1, −1, 5, −7, 3, 7};

{1, 1, 5, −5, 3, −3}, {1, 1, 7, −5, 7, −1}, {1, 1, 7, −1, 3, −1}, {1, 1,−5, 3, −1, 3}, {1, 1, −5, 7, −5, 3}, {1, 1, −3, 7, −1, 5}, {1, 3, 7, −5,3, −3}, {1, 3, −1, −7, 1, 5}, {1, 5, 1, −7, 3, 3}, {1, 5, 1, −5, −5, 1},{1, 5, 3, −1, −5, 3}, {1, 5, 5, 1, −5, 3}, {1, 5, 7, 3, −3, 5}, {1, 5,−7, 1, −5, 7}, {1, 5, −7, −5, 7, 1}, {1, 5, −5, 3, −3, −7}, {1, 5, −5,3, −1, −5}, {1, 5, −5, −5, 5, −3}, {1, 5, −3, 3, 3, −3}, {1, 5, −3, 7,3, 5}, {1, 7, 7, 1, −7, 5}, {1, 7, 7, 1, −3, 1}, {1, 7, −5, 7, −1, −7},{1, 7, −5, −7, 5, 1}, {1, 7, −5, −5, 7, 1}, {1, 7, −1, 3, −1, −7}, {1,7, −1, −7, 5, 5}, {1, 7, −1, −5, 7, 5}, {1, −7, 3, 3, −7, −3}, {1, −7,3, −1, 1, 5}, {1, −7, 5, 1, −1, 3}, {1, −7, 5, −7, −1, −1}, {1, −7, −3,1, 3, −1}, {1, −7, −3, −7, 3, 3}, {1, −7, −1, 3, 3, −1}, {1, −7, −1, −1,−7, 5}, {1, −5, 3, 7, −5, −3}, {1, −5, 3, −1, 3, −7}, {1, −5, 7, 7, −5,1}, {1, −5, 7, −7, −3, 1}, {1, −5, 7, −5, 3, −7}, {1, −5, −5, 1, 5, 1},{1, −5, −5, 1, −7, −3}, {1, −3, 1, 7, 7, 1}, {1, −3, 1, −7, −1, −1}, {1,−3, 5, −5, −1, −3}, {1, −3, 5, −1, −1, 5}, {1, −3, 7, 7, −3, 5}, {1, −3,7, −1, 3, 7}, {1, −3, 7, −1, 5, −7}, {1, −3, −7, 1, 7, −5}, {1, −3, −7,7, −5, 1}, {1, −3, −3, 1, 7, −1}, {1, −3, −1, 3, 7, −1}, {1, −1, 3, −7,1, −3}, and {1, −1, −5, 7, −1, 5};

{1, 3, 7, −5, 1, −3}, {1, 3, −7, 5, 1, 5}, {1, 3, −7, −3, 1, −3}, {1, 3,−1, −5, 1, 5}, {1, 5, 1, −3, 3, 5}, {1, 5, 1, −3, 7, 5}, {1, 5, 1, −3,−5, 5}, {1, 5, 1, −3, −1, 5}, {1, 5, 3, −3, −7, 5}, {1, 5, 7, 3, −1, 5},{1, 5, 7, −3, −7, 5}, {1, 5, −7, 3, 1, −3}, {1, 5, −7, 5, 1, 7}, {1, 5,−7, 7, 3, −1}, {1, 5, −7, −5, 1, −3}, {1, 5, −7, −1, 1, −3}, {1, 5, −5,7, 3, 5}, {1, 5, −5, −3, −7, 5}, {1, 5, −1, −5, 7, 5}, {1, 5, −1, −3,−7, 5}, {1, 7, 3, −1, 3, 7}, {1, 7, −7, 5, 1, 5}, {1, 7, −7, −3, 1, −3},{1, 7, −5, −1, 1, −3}, {1, −5, 7, 3, 1, 5}, {1, −5, −7, 5, 1, 5}, {1,−3, 1, 5, 7, −3}, {1, −3, 1, 5, −5, −3}, {1, −3, 3, 5, −7, −3}, {1, −3,−7, 3, 1, 5}, {1, −3, −7, 7, 1, 5}, {1, −3, −7, −5, 1, 5}, {1, −3, −7,−3, 1, −1}, {1, −3, −7, −1, 1, 5}, {1, −3, −5, 5, −7, −3}, {1, −3, −1,3, 7, −3}, {1, −3, −1, 5, −7, −3}, {1, −1, 3, 7, 3, −1}, {1, −1, −7, 5,1, 5}, and {1, −1, −5, 7, 1, 5};

{1, 3, −3, 1, 3, −3}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 3, 7}, {1,3, −3, −7, −5, 5}, {1, 3, −3, −1, 3, −3}, {1, 5, −1, −7, 3, 7}, {1, 7,3, 1, 5, −1}, {1, 7, 3, 1, 7, 5}, {1, 7, 3, 1, −5, −1}, {1, 7, 3, 1, −3,3}, {1, 7, 3, 5, −7, 3}, {1, 7, 3, 5, −1, 3}, {1, 7, 3, 7, 1, 3}, {1, 7,3, −7, 3, 7}, {1, 7, 3, −7, 5, −5}, {1, 7, 3, −7, 7, −3}, {1, 7, 3, −7,−3, 7}, {1, 7, 3, −7, −1, −3}, {1, 7, 3, −3, 1, −5}, {1, 7, 3, −3, 7,−5}, {1, 7, 3, −1, −7, −5}, {1, 7, 5, 1, 7, 5}, {1, 7, 5, −7, −1, −3},{1, 7, 5, −1, −7, −3}, {1, −5, −3, 1, −5, −3}, {1, −5, −3, 7, −5, 5},{1, −5, −3, −7, 3, 5}, {1, −5, −3, −7, 3, 7}, {1, −5, −3, −1, 3, −3},{1, −3, 3, 1, 3, −3}, {1, −3, 3, 1, 5, −1}, {1, −3, 3, 1, −5, −1}, {1,−3, 3, 5, −7, 3}, {1, −3, 3, 5, −1, 3}, {1, −3, 3, 7, −3, −5}, {1, −3,3, −7, 3, 7}, {1, −3, 3, −7, −5, 5}, {1, −3, 3, −7, −3, 7}, {1, −3, 3,−3, 7, −5}, {1, −3, 3, −1, 5, 3}, {1, −1, 5, 1, −1, 5}, {1, −1, 5, −7,7, −3}, and {1, −1, 5, −7, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {13, 3, −3, 5, −5},{13, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5,7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5, −1, −7,−3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5, −3},{1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3}, {1, 5,1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1, −7, 5,−3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5, −3},{1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1, 5,3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5, 1,−5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7};

{1, 1, 3, 5, −3, 7}, {1, 1, 3, −7, −1, 7}, {1, 1, 3, −5, 5, −1}, {1, 1,3, −3, 7, −1}, {1, 1, 5, 7, −5, 5}, {1, 3, 1, −7, 3, −5}, {1, 3, 1, −5,3, −5}, {1, 3, 1, −5, 5, −3}, {1, 3, 1, −5, 5, −1}, {13, 3, −3, 5, −5},{13, 3, −3, 7, −1}, {1, 3, 5, 1, −5, 5}, {1, 3, 5, 1, −5, 7}, {1, 3, 5,7, 3, −3}, {1, 3, 5, −7, −3, 7}, {1, 3, 5, −1, −7, 7}, {1, 3, 5, −1, −7,−3}, {1, 3, 5, −1, −3, 7}, {1, 5, 1, 3, −5, −7}, {1, 5, 1, 5, 5, −3},{1, 5, 1, 5, −7, 1}, {1, 5, 1, 5, −7, −7}, {1, 5, 1, 5, −3, −3}, {1, 5,1, 7, 3, −3}, {1, 5, 1, 7, 5, −5}, {1, 5, 1, 7, 5, −3}, {1, 5, 1, −7, 5,−3}, {1, 5, 1, −7, 7, −5}, {1, 5, 1, −3, 3, −3}, {1, 5, 1, −3, 5, −3},{1, 5, 3, −5, 5, 7}, {1, 5, 3, −3, 7, 7}, {1, 5, 3, −3, 7, −5}, {1, 5,3, −3, −3, 7}, {1, 5, 3, −1, 7, −5}, {1, 5, 3, −1, −7, −3}, {1, 5, 5, 1,−5, −1}, {1, 7, 1, 3, −7, 7}, {1, 7, 1, 3, −7, −7}, {1, 7, 1, 3, −5,−7}, {1, 7, 1, 3, −3, 3}, {1, 7, 1, 5, −7, 7}, {1, 7, 1, 7, 7, −1}, {1,7, 1, 7, −7, 1}, {1, 7, 1, −7, −7, −5}, {1, 7, 1, −7, −5, 3}, {1, 7, 1,−5, −7, −3}, {1, 7, 1, −3, 3, 5}, {1, 7, 1, −3, 3, −1}, {1, 7, 1, −1, 3,7}, {1, 7, 1, −1, 5, 7}, {1, 7, 3, 5, −3, 3}, {1, −7, 1, 1, 5, 7}, {1,−7, 1, 1, 7, 7}, {1, −7, 1, 3, 7, 7}, {1, −7, 1, 3, −7, 7}, {1, −7, 1,3, −3, −5}, {1, −7, 1, 5, 7, 7}, {1, −7, 1, 7, 5, −1}, {1, −7, 1, −5,−7, −5}, {1, −7, 1, −5, −7, −1}, {1, −7, 1, −5, −5, 1}, {1, −7, 1, −5,−5, −3}, {1, −7, 1, −5, −5, −1}, {1, −7, 1, −5, −3, 1}, {1, −7, 1, −5,−3, 3}, {1, −7, 1, −3, −7, −3}, {1, −7, 1, −1, 5, 7}, {1, −7, 3, 3, −7,−5}, {1, −7, 3, 3, −5, −5}, {1, −7, 3, 5, −5, −5}, {1, −7, 3, 5, −3, 3},{1, −7, 3, 5, −3, −5}, {1, −7, 3, 5, −3, −1}, {1, −7, 3, 7, 7, −1}, {1,−7, 3, −5, −3, −1}, {1, −7, 3, −1, −5, −3}, {1, −5, 1, 3, 5, 7}, {1, −5,1, 3, −1, 5}, {1, −5, 1, 5, −7, 7}, {1, −5, 1, 7, −7, −7}, {1, −5, 1,−7, 7, −1}, {1, −5, 1, −7, −7, −1}, {1, −5, 1, −3, −7, −3}, {1, −5, 1,−3, −1, 5}, {1, −5, 1, −1, 7, −7}, {1, −5, 3, 1, 5, −1}, {1, −5, 3, 1,7, −1}, {1, −5, 3, 5, 7, −1}, {1, −5, 3, 5, −3, −3}, {1, −5, 3, 7, −7,5}, {1, −5, 3, −7, 7, −1}, {1, −5, 3, −7, −7, 1}, {1, −5, 3, −7, −7,−1}, {1, −5, 3, −7, −5, 1}, {1, −5, 5, 1, 3, 7}, {1, −5, 5, 1, −5, −3},{1, −5, 5, 7, −5, −3}, {1, −5, 5, −7, −5, 5}, {1, −5, 5, −7, −5, −1},{1, −5, 5, −1, 3, 5}, {1, −3, 1, 5, −3, −7}, {1, −3, 1, 5, −3, −5}, {1,−3, 1, 7, −5, −7}, {1, −3, 1, 7, −3, −5}, {1, −3, 1, −7, 7, −1}, {1, −3,3, 1, 7, −1}, {1, −1, 1, 3, −3, 7}, {1, −1, 1, 5, −3, 7}, {1, −1, 1, 7,−1, −7}, {1, −1, 3, 7, −5, 5}, {1, −1, 3, −7, −3, 5}, {1, −1, 3, −7, −3,7}, {1, −1, 3, −3, 7, 7}, and {1, −1, 3, −3, −3, 7}; or

{1, 1, −7, 5, −1, 1}, {1, 1, −7, 7, −3, 1}, {1, 1, −7, −5, 5, 1}, {1, 1,−7, −3, 3, 1}, {1, 1, −7, −3, −5, 1}, {1, 1, −7, −1, −3, 1}, {1, 3, 7,1, 5, 1}, {1, 3, −5, 3, 5, 1}, {1, 3, −5, 3, 5, −3}, {1, 3, −5, 7, −7,1}, {1, 3, −5, 7, −5, 5}, {1, 3, −5, 7, −1, 1}, {1, 3, −5, −5, 3, −1},{1, 3, −5, −3, 5, 1}, {1, 3, −3, 1, −5, −1}, {1, 3, −3, −7, 1, 1}, {1,3, −1, 7, −7, 1}, {1, 5, 1, −7, −5, −1}, {1, 5, 3, −7, 1, 1}, {1, 5, 7,−1, −5, −1}, {1, 5, −5, −7, 1, 1}, {1, 5, −3, −5, 3, 1}, {1, 5, −1, 3,5, −3}, {1, 5, −1, 3, −3, −1}, {1, 5, −1, 3, −1, 7}, {1, 7, 5, −7, 1,1}, {1, 7, 5, −3, −3, 5}, {1, 7, −5, 3, 3, −5}, {1, −7, 1, 3, −5, 7},{1, −7, 1, 3, −1, 7}, {1, −7, 5, 7, −1, 7}, {1, −7, 5, −7, 3, 7}, {1,−7, 5, −3, −1, 7}, {1, −7, 5, −1, 1, −7}, {1, −7, 7, −3, 1, −7}, {1, −7,7, −1, 3, −5}, {1, −7, 7, −1, −3, 5}, {1, −7, −7, 1, 3, −3}, {1, −7, −7,1, 5, −5}, {1, −7, −7, 1, 7, 5}, {1, −7, −7, 1, −3, 7}, {1, −7, −7, 1,−1, 5}, {1, −7, −5, 3, 5, −3}, {1, −7, −5, 3, −5, −3}, {1, −7, −5, 3,−1, 1}, {1, −7, −5, 3, −1, 7}, {1, −7, −5, 5, 1, −7}, {1, −7, −5, 7, −1,1}, {1, −7, −5, −1, −7, −3}, {1, −7, −3, 3, 1, −7}, {1, −7, −3, 5, 3,−5}, {1, −7, −3, −5, 1, −7}, {1, −7, −1, −3, 1, −7}, {1, −5, 7, −1, −1,7}, {1, −5, −3, 5, 5, −3}, {1, −5, −3, 7, −5, 5}, {1, −5, −1, −7, −5,5}, {1, −5, −1, −7, −3, 7}, {1, −5, −1, −5, 3, 5}, {1, −3, 1, −5, −1,1}, {1, −3, 5, 5, −3, −1}, {1, −3, 5, 7, −1, 1}, {1, −3, 5, 7, −1, 7},{1, −3, 7, −7, 1, 1}, {1, −3, −1, 7, −1, 1}, {1, −1, 3, −5, −5, 3}, {1,−1, 5, −7, 1, 1}, {1, −1, 5, −3, −3, 5}, {1, −1, 7, 5, −3, 1}, {1, −1,7, 7, −1, 3}, and {1, −1, 7, −5, 3, 1};

a generation unit, configured to generate a first signal based on thesequence {x_(n)}; and

a sending unit, configured to send the first signal.

It should be understood that, the foregoing sequence may further beprocessed according to some or all of steps S301 to S304 in theforegoing embodiment. S301 to S304 may be implemented by one or moreindividual processing units or processors. The terminal device mayalternatively be another network device.

In an embodiment, the set of the sequence {s_(n)} includes at least oneof sequences in a second sequence set, and the second sequence setincludes some of the sequences in the first sequence set.

In an implementation of this embodiment, the generation unit is furtherconfigured to perform discrete Fourier transform on N elements in thesequence {x_(n)} to obtain a sequence {f_(n)} including N elements;

the generation unit is further configured to map the N elements in thesequence {f_(n)} to N subcarriers respectively to obtain afrequency-domain signal including the N elements; and

the generation unit is further configured to generate the first signalbased on the frequency-domain signal.

In an implementation of this embodiment, the N subcarriers are Nconsecutive subcarriers, or N equi-spaced subcarriers.

In an implementation of this embodiment, the signal processing apparatusfurther includes a filter unit, configured to: filter the sequence {x₇}before the discrete Fourier transform is performed on the N elements; or

filter the sequence {x_(n)} after the discrete Fourier transform isperformed on the N elements.

In an implementation of this embodiment, the first signal is a referencesignal of a second signal, and a modulation scheme of the second signalis π/2 binary phase shift keying BPSK.

The foregoing describes in detail the signal processing method accordingto the embodiments of this application, and the following describes asignal processing apparatus in the embodiments of this application.

FIG. 10 is a schematic block diagram of a signal processing apparatus1000 according to an embodiment of this application.

It should be understood that, the apparatus 1000 may correspond to theterminal in the embodiment shown in FIG. 4, and may have any function ofthe terminal in the method.

The apparatus 1000 includes a transceiver module 1020 and a processingmodule 1010.

The processing module 1010 is configured to generate a reference signalof a first signal. The first signal is a signal modulated by using pi/2BPSK, the reference signal is generated by using a first sequence, and alength of the first sequence is K.

The transceiver module 1020 is configured to send the reference signalon a first frequency-domain resource. The first frequency-domainresource includes K subcarriers each having a subcarrier number of k,k=u+L*n+delta, n=0, 1, . . . , K−1, L is an integer greater than orequal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, and thesubcarrier numbers are numbered in ascending or descending order offrequencies.

The processing module 1010 is specifically configured to:

determine the first sequence, where the first sequence varies as a deltavalue varies.

In an embodiment, that the first sequence varies means that a basesequence {s(n)} of the first sequence varies as the delta value vanes.

Optionally, a modulation scheme of the first sequence is neither BPSKmodulation nor π/2 BPSK modulation.

Optionally, the first sequence is a sequence modulated by using any oneof 8 PSK, 16 PSK, or 32 PSK.

Optionally, the processing module is further configured to determine thefirst sequence in a first sequence group. The first sequence group isone of a plurality of sequence groups, and the first sequence isdetermined, based on the delta value, in a plurality of sequences thatare in the first sequence group and whose length is K.

Optionally, the processing module is further configured to determine thefirst sequence group based on a cell identifier or a sequence groupidentifier.

Optionally, the transceiver module is further configured to receiveindication information, and the indication information is used toindicate a sequence that is in each of at least two sequence groups andused to generate the reference signal.

Optionally, when delta=0, the processing module is specificallyconfigured to:

perform discrete Fourier transform on elements in a sequence {z(t)} toobtain a sequence {f(t)} with t=0, . . . , L*K−1, where when t=0, 1, . .. , L*K−1, z(t)=x(t mod K), and x(t) represents the first sequence; and

map elements numbered L*p+delta in the sequence {f(t)} to thesubcarriers each having the subcarrier number of u+L*p+deltarespectively, to generate the reference signal, where p=0, . . . , K−1.

Optionally, when L=2 and delta=1, the processing module is specificallyconfigured to:

perform discrete Fourier transform on elements in a sequence {z(t)} toobtain a sequence {f(t)} with t=0, . . . , L*K−1, where when t=0, . . ., K−1, z(t)=x(t), when t=K, . . . , L*K−1, z(t)=−x(t mod K), and x(t)represents the first sequence; and

map elements numbered L*p+delta in the sequence {f(t)} to thesubcarriers each having the subcarrier number of u+L*p+deltarespectively, to generate the reference signal, where p=0, . . . , K−1.

Optionally, when L=4, the processing module is specifically configuredto:

perform discrete Fourier transform on elements in a sequence {z(t)} toobtain a sequence {f(t)} with t=0, . . . , 4K−1, where when t=0, 1, . .. , 4K−1,

${{z(t)} = {{w_{delta}\left( \left\lfloor \frac{t}{K} \right\rfloor \right)}{x\left( {t\mspace{14mu}{mod}\mspace{14mu} K} \right)}}},$

where w₀=(1, 1, 1, 1), w₁=(1, −1, 1, −1), w₂=(1, 1, −1, −1), w₃=(1, −1,−1, 1), └c┘ represents rounding down of c, and x(t) represents the firstsequence, where in another embodiment, w₀(1, 1, 1, 1), w₁=(1, j, −1, −j)w₂=(1, −1, 1, −1), and w₃=(1, −j, −1, j); and

map elements numbered 4p+delta in the sequence {f(t)} to the subcarrierseach having the subcarrier number of u+L*p+delta respectively togenerate the reference signal, where p=0, . . . , K−1.

Optionally, the processing module is specifically configured to:

perform discrete Fourier transform on elements in a sequence {x(t)} toobtain a sequence {f(t)} with t=0, . . . , K−1, where x(t) representsthe first sequence; and map elements numbered p in the sequence {f(t)}to the subcarriers each having the subcarrier number of u+L*p+deltarespectively to generate the reference signal, where p=0, . . . , K−1.

Optionally, the processing module is specifically configured to:

perform discrete Fourier transform on the sequence {z(t)}; and

filter a sequence obtained after the discrete Fourier transform, togenerate the sequence {f(t)}.

FIG. 11 is a schematic block diagram of a signal processing apparatus1100 according to an embodiment of this application. The apparatus 1100may be the terminal shown in FIG. 1 and the terminal shown in FIG. 4.The apparatus may use a hardware architecture shown in FIG. 11. Theapparatus may include a processor 1110 and a transceiver 1120.Optionally, the apparatus may further include a memory 1130. Theprocessor 1110, the transceiver 1120, and the memory 1130 communicatewith each other through an internal connection path. A related functionimplemented by the processing module 1020 in FIG. 10 may be implementedby the processor 1110, and a related function implemented by thetransceiver module 1010 may be implemented by the processor 1110 bycontrolling the transceiver 1120.

Optionally, the processor 1110 may be a general-purpose centralprocessing unit (CPU), a microprocessor, an application-specificintegrated circuit (ASIC), a dedicated processor, or one or moreintegrated circuits configured to perform the technical solutions in theembodiments of this application. Alternatively, the processor may be oneor more devices, circuits, and/or processing cores for processing data(for example, a computer program instruction). For example, theprocessor may be a baseband processor or a central processing unit. Thebaseband processor may be configured to process a communication protocoland communication data. The central processing unit may be configuredto: control the apparatus (for example, a base station, a terminal, or achip), execute a software program, and process data of the softwareprogram.

Optionally, the processor 1110 may include one or more processors, forexample, include one or more central processing units (CPU). When theprocessor is one CPU, the CPU may be a single-core CPU or a multi-coreCPU.

The transceiver 1120 is configured to: send data and/or a signal, andreceive data and/or a signal. The transceiver may include a transmitterand a receiver. The transmitter is configured to send data and/or asignal, and the receiver is configured to receive data and/or a signal.

The memory 1130 includes but is not limited to a random access memory(RAM), a read-only memory (ROM), an erasable programmable read-onlymemory (EPROM), and a compact disc read-only memory (CD-ROM). The memory1130 is configured to store a related instruction and related data.

The memory 1130 is configured to store program code and data of theterminal, and may be a separate component or integrated into theprocessor 1110.

Specifically, the processor 1110 is configured to control thetransceiver to perform information transmission with a network device.For details, refer to the descriptions in the foregoing methodembodiments. Details are not described herein again.

It may be understood that FIG. 11 shows merely a simplified design ofthe signal processing apparatus. During actual application, theapparatus may further include other necessary elements, including butnot limited to any quantity of transceivers, processors, controllers,memories, and the like, and all terminals that can implement thisapplication shall fall within the protection scope of this application.

In a possible design, the apparatus 1100 may be a chip, for example, maybe a communications chip that can be used in the terminal, and isconfigured to implement a related function of the processor 1110 in theterminal. The chip may be a field programmable gate array, dedicatedintegrated chip, system chip, central processing unit, networkprocessor, digital signal processing circuit, or microcontroller thatimplements a related function, or may be a programmable controller oranother integrated chip. Optionally, the chip may include one or morememories, configured to store program code. When the code is executed,the processor is enabled to implement a corresponding function.

During specific implementation, in an embodiment, the apparatus 1100 mayfurther include an output device and an input device. The output devicecommunicates with the processor 1110, and may display information in aplurality of manners. For example, the output device may be a liquidcrystal display (LCD), a light emitting diode (LED) display device, acathode ray tube (CRT) display device, a projector, or the like. Whencommunicating with the processor 1110, the input device may receive aninput of a user in a plurality of manners. For example, the input devicemay be a mouse, a keyboard, a touchscreen device, or a sensing device.

FIG. 12 is a schematic block diagram of a signal processing apparatus1200 according to an embodiment of this application.

It should be understood that the apparatus 1200 may correspond to thenetwork device in the embodiment shown in FIG. 4, and may have anyfunction of the network device in the method. The apparatus 1200includes a transceiver module 1220 and a processing module 1210.

The processing module 1210 is configured to generate a local sequence.The local sequence is a first sequence or a conjugate transpose of afirst sequence, and the local sequence is used to process a firstsignal. The first signal is a signal modulated by using pi/2 BPSK.

The transceiver module 1220 is configured to receive a reference signalof the first signal on a first frequency-domain resource. The firstfrequency-domain resource includes K subcarriers each having asubcarrier number of k, k=u+M*n+delta, n=0, 1, . . . , K−1, M is aninteger greater than or equal to 2, delta∈{0, 1, . . . , M−1}, u is aninteger, and the subcarrier numbers are numbered in ascending ordescending order of frequencies. The reference signal is generated byusing the first sequence. The first sequence varies as a delta valuevaries.

Optionally, the transceiver module is further configured to sendindication information. The indication information is used to indicate asequence that is in each of at least two sequence groups and used togenerate the reference signal.

FIG. 13 shows a signal processing apparatus 1300 according to anembodiment of this application. The apparatus 1300 may be the networkdevice shown in FIG. 1 and the network device in FIG. 4. The apparatusmay use a hardware architecture shown in FIG. 13. The apparatus mayinclude a processor 1310 and a transceiver 1320. Optionally, theapparatus may further include a memory 1330. The processor 1310, thetransceiver 1320, and the memory 1330 communicate with each otherthrough an internal connection path. A related function implemented bythe processing module 1220 in FIG. 12 may be implemented by theprocessor 1310, and a related function implemented by the transceivermodule 1210 may be implemented by the processor 1310 by controlling thetransceiver 1320.

Optionally, the processor 1310 may be a general-purpose centralprocessing unit (CPU), a microprocessor, an application-specificintegrated circuit (ASIC), a dedicated processor, or one or moreintegrated circuits configured to perform the technical solutions in theembodiments of this application. Alternatively, the processor may be oneor more devices, circuits, and/or processing cores for processing data(for example, a computer program instruction). For example, theprocessor may be a baseband processor or a central processing unit. Thebaseband processor may be configured to process a communication protocoland communication data. The central processing unit may be configuredto: control the apparatus (for example, a base station, a terminal, or achip), execute a software program, and process data of the softwareprogram.

Optionally, the processor 1310 may include one or more processors, forexample, include one or more central processing units (CPU). When theprocessor is one CPU, the CPU may be a single-core CPU or a multi-coreCPU.

The transceiver 1320 is configured to: send data and/or a signal andreceive data and/or a signal. The transceiver may include a transmitterand a receiver. The transmitter is configured to send data and/or asignal, and the receiver is configured to receive data and/or a signal.

The memory 1330 includes but is not limited to a random access memory(RAM), a read-only memory (ROM), an erasable programmable read-onlymemory (EPROM), and a compact disc read-only memory (CD-ROM). The memory1330 is configured to store a related instruction and related data.

The memory 1330 is configured to store program code and data of theterminal, and may be a separate component or integrated into theprocessor 1310.

Specifically, the processor 1310 is configured to control thetransceiver to perform information transmission with the terminal. Fordetails, refer to the descriptions in the foregoing method embodiments.Details are not described herein again.

During specific implementation, in an embodiment, the apparatus 1300 mayfurther include an output device and an input device. The output devicecommunicates with the processor 1310, and may display information in aplurality of manners. For example, the output device may be a liquidcrystal display (LCD), a light emitting diode (LED) display device, acathode ray tube (CRT) display device, a projector, or the like. Whencommunicating with the processor 1310, the input device may receive aninput of a user in a plurality of manners. For example, the input devicemay be a mouse, a keyboard, a touchscreen device, or a sensing device.

It may be understood that FIG. 13 shows merely a simplified design ofthe signal processing apparatus. During actual application, theapparatus may further include other necessary elements, including butnot limited to any quantity of transceivers, processors, controllers,memories, and the like, and all terminals that can implement thisapplication shall fall within the protection scope of this application.

In a possible design, the apparatus 1300 may be a chip, for example, maybe a communications chip that can be used in the terminal and isconfigured to implement a related function of the processor 1310 in theterminal. The chip may be a field programmable gate array, dedicatedintegrated chip, system chip, central processing unit, networkprocessor, digital signal processing circuit, or microcontroller thatimplements a related function, or may be a programmable controller oranother integrated chip. Optionally, the chip may include one or morememories, configured to store program code. When the code is executed,the processor is enabled to implement a corresponding function.

An embodiment of this application further provides an apparatus. Theapparatus may be a terminal or a circuit. The apparatus may beconfigured to perform an action performed by the terminal in theforegoing method embodiments.

Optionally, when the apparatus in this embodiment is a terminal, FIG. 14is a simplified schematic structural diagram of a terminal. For ease ofunderstanding and convenience of figure illustration, an example inwhich the terminal is a mobile phone is used in FIG. 14. As shown inFIG. 14, the terminal includes a processor, a memory, a radio frequencycircuit, an antenna, and an input/output apparatus. The processor ismainly configured to: process a communication protocol and communicationdata, control the terminal to execute a software program, process dataof the software program, and so on. The memory is mainly configured tostore the software program and data. The radio frequency circuit ismainly configured to: perform conversion between a baseband signal and aradio frequency signal and process the radio frequency signal. Theantenna is mainly configured to send and receive a radio frequencysignal in an electromagnetic wave form. The input/output apparatus, suchas a touchscreen, a display, or a keyboard, is mainly configured toreceive data input by a user and data output to the user. It should benoted that some types of terminals may not have an input/outputapparatus.

When data needs to be sent, the processor performs baseband processingon the to-be-sent data, and then outputs a baseband signal to the radiofrequency circuit. The radio frequency circuit performs radio frequencyprocessing on the baseband signal, and then sends the radio frequencysignal in an electromagnetic wave form via the antenna. When data issent to the terminal, the radio frequency circuit receives a radiofrequency signal via the antenna, converts the radio frequency signalinto a baseband signal, and outputs the baseband signal to theprocessor. The processor converts the baseband signal into data andprocesses the data. For ease of description, FIG. 14 shows only onememory and one processor. In an actual terminal product, there may beone or more processors and one or more memories. The memory may also bereferred to as a storage medium, a storage device, or the like. Thememory may be disposed independent of the processor, or may beintegrated with the processor. This is not limited in this embodiment ofthis application.

In this embodiment of this application, an antenna and a radio frequencycircuit that have receiving and sending functions may be considered as atransceiver unit of the terminal, and a processor that has a processingfunction may be considered as a processing unit of the terminal. Asshown in FIG. 14, the terminal includes a transceiver unit 1410 and aprocessing unit 1420. The transceiver unit may also be referred to as atransceiver, a transceiver machine, a transceiver apparatus, or thelike. The processing unit may also be referred to as a processor, aprocessing board, a processing module, a processing apparatus, or thelike. Optionally, a component that is in the transceiver unit 1410 andthat is configured to implement a receiving function may be consideredas a receiving unit, and a component that is in the transceiver unit1410 and that is configured to implement a sending function may beconsidered as a sending unit. In other words, the transceiver unit 1410includes the receiving unit and the sending unit. The transceiver unitsometimes may also be referred to as a transceiver machine, atransceiver, a transceiver circuit, or the like. The receiving unitsometimes may also be referred to as a receiver machine, a receiver, areceiving circuit, or the like. The sending unit sometimes may also bereferred to as a transmitter machine, a transmitter, a transmittercircuit, or the like.

It should be understood that the transceiver unit 1410 is configured toperform a sending operation and a receiving operation on the terminalside in the foregoing method embodiments, and the processing unit 1420is configured to perform another operation other than the sending andreceiving operations of the terminal in the foregoing methodembodiments.

For example, in an implementation, the processing unit 1420 isconfigured to perform an operation in step 403 in FIG. 4, and/or theprocessing unit 1420 is further configured to perform another processingstep on the terminal side in the embodiments of this application. Thetransceiver unit 1410 is configured to perform sending and receivingoperations in step 401, step 402, and/or step 404 in FIG. 4, and/or thetransceiver unit 1410 is further configured to perform other sending andreceiving steps on the terminal side in the embodiments of thisapplication.

When the communications apparatus is a chip, the chip includes atransceiver unit and a processing unit. The transceiver unit may be aninput/output circuit or a communications interface. The processing unitis a processor, a microprocessor, or an integrated circuit, integratedon the chip.

Optionally, when the apparatus is a terminal, reference may be furthermade to a device shown in FIG. 15. In an example, the device mayimplement a function similar to that of the processor 1410 in FIG. 14.In FIG. 15, the device includes a processor 1501, a data sendingprocessor 1503, and a data receiving processor 1505. The processingmodule 1010 and the processing module 1210 in the foregoing embodimentseach may be the processor 1501 in FIG. 15, and complete a correspondingfunction. The transceiver module 1020 and the transceiver module 1220 inthe foregoing embodiments may be the data sending processor 1503 and thedata receiving processor 1505 in FIG. 15. Although a channel encoder anda channel decoder are shown in the FIG. 15, it may be understood thatthe modules are merely an example and do not constitute a limitation onthis embodiment.

FIG. 16 shows another form of this embodiment. A processing apparatus1600 includes modules such as a modulation subsystem, a centralprocessing subsystem, and a peripheral subsystem. A communicationsdevice in this embodiment may be used as the modulation subsystem in theprocessing apparatus 1600. Specifically, the modulation subsystem mayinclude a processor 1603 and an interface 1604. The processor 1603implements a function of the processing module 1010, and the interface1604 implements a function of the transceiver module 1020. In anothervariant, the modulation subsystem includes a memory 1606, a processor1603, and a program that is stored in the memory 1603 and that can berun by the processor. When executing the program, the processorimplements the method according to any one of the foregoing embodiments.It should be noted that the memory 1606 may be nonvolatile or volatile.The memory 1606 may be located in the modulation subsystem, or may belocated in the processing apparatus 1600, as long as the memory 1606 canbe connected to the processor 1603.

When the apparatus in this embodiment is a network device, the networkdevice may be shown in FIG. 17. An apparatus 1700 includes one or moreradio frequency units, such as a remote radio unit (RRU) 1710, and oneor more baseband units (BBU) (which may also be referred to as a digitalunit, DU) 1720. The RRU 1710 may be referred to as a transceiver moduleand corresponds to the transceiver unit 1220 in FIG. 12. Optionally, thetransceiver module may also be referred to as a transceiver machine, atransceiver circuit, a transceiver, or the like and may include at leastone antenna 1715 and a radio frequency unit 1716. The RRU 1710 is mainlyconfigured to: receive and send a radio frequency signal, and performconversion between a radio frequency signal and a baseband signal, forexample, configured to send indication information to a terminal device.The BBU 1710 is mainly configured to: perform baseband processing,control a base station, and so on. The RRU 1710 and the BBU 1720 may bephysically disposed together, or may be physically separated, namely, adistributed base station.

The BBU 1720 is a control center of the base station, and may also bereferred to as a processing module. The BBU 1720 may correspond to theprocessing unit 1210 in FIG. 12, and is mainly configured to implement abaseband processing function, for example, channel coding, multiplexing,modulation, or spreading. For example, the BBU (processing module) maybe configured to control the base station to execute an operationprocedure related to the network device in the foregoing methodembodiments, for example, to generate the indication information.

In an example, the BBU 1720 may include one or more boards, and aplurality of boards may jointly support a radio access network (such asan LTE network) having a single access standard, or may separatelysupport radio access networks (for example, an LTE network, a 5Gnetwork, or another network) having different access standards. The BBU1720 further includes a memory 1721 and a processor 1722. The memory1721 is configured to store a necessary instruction and necessary data.The processor 1722 is configured to control the base station to performa necessary action, for example, configured to control the base stationto perform an operation procedure related to the network device in theforegoing method embodiments. The memory 1721 and the processor 1722 mayserve one or more boards. In other words, a memory and a processor maybe independently disposed on each board. Alternatively, a plurality ofboards may share a same memory and a same processor. In addition, anecessary circuit may further be disposed on each board.

In another form of this embodiment, a computer-readable storage mediumis provided. The computer-readable storage medium stores an instruction.When the instruction is executed, a method in the foregoing methodembodiments is performed.

In another form of this embodiment, a computer program product includingan instruction is provided. When the instruction is executed, a methodin the foregoing method embodiments is performed.

All or some of the foregoing embodiments may be implemented by usingsoftware, hardware, firmware, or any combination thereof. When beingimplemented by using the software, all or some of the embodiments may beimplemented in a form of a computer program product. The computerprogram product includes one or more computer instructions. When thecomputer instructions are loaded and executed on a computer, theprocedures or functions according to the embodiments of this applicationare all or partially generated. The computer may be a general-purposecomputer, a dedicated computer, a computer network, or anotherprogrammable apparatus. The computer instructions may be stored in acomputer-readable storage medium or may be transmitted from acomputer-readable storage medium to another computer-readable storagemedium. For example, the computer instructions may be transmitted from awebsite, computer, server, or data center to another website, computer,server, or data center in a wired (for example, a coaxial cable, anoptical fiber, or a digital subscriber line (DSL)) or wireless (forexample, infrared, radio, and microwave, or the like) manner. Thecomputer-readable storage medium may be any usable medium accessible bya computer, or a data storage device, such as a server or a data center,integrating one or more usable media. The usable medium may be amagnetic medium (for example, a floppy disk, a hard disk, or a magnetictape), an optical medium (for example, a high density digital video disc(DVD)), a semiconductor medium (for example, a solid-state drive (SSD)),or the like.

It should be understood that, the processor may be an integrated circuitchip, and has a signal processing capability. In an implementationprocess, the steps in the foregoing method embodiments may be completedby using a hardware integrated logical circuit in the processor or aninstruction in a form of software. The foregoing processor may be ageneral-purpose processor, a digital signal processor (DSP), anapplication-specific integrated circuit (ASIC), a field programmablegate array (FPGA) or another programmable logic device, a discrete gateor a transistor logic device, or a discrete hardware component. Themethods, the steps, and logical block diagrams that are disclosed in theembodiments of this application may be implemented or performed. Thegeneral-purpose processor may be a microprocessor, or the processor maybe any conventional processor or the like. The steps of the methodsdisclosed with reference to the embodiments of this application may bedirectly executed and completed by using a hardware decoding processor,or may be executed and completed by using a combination of hardware andsoftware modules in the decoding processor. A software module may belocated in a mature storage medium in the art, such as a random accessmemory, a flash memory, a read-only memory, a programmable read-onlymemory, an electrically erasable programmable memory, a register, or thelike. The storage medium is located in the memory, and the processorreads information in the memory and completes the steps in the foregoingmethods in combination with hardware of the processor.

It may be understood that the memory in the embodiments of thisapplication may be a volatile memory or a nonvolatile memory, or mayinclude both a volatile memory and a nonvolatile memory. The nonvolatilememory may be a read-only memory (ROM), a programmable read-only memory(PROM), an erasable programmable read-only memory (EPROM), anelectrically erasable programmable read-only memory (EEPROM), or a flashmemory. The volatile memory may be a random access memory (RAM), used asan external cache. Through examples but not limitative descriptions,RAMs in many forms are used, for example, a static random access memory(SRAM), a dynamic random access memory (DRAM), a synchronous dynamicrandom access memory (SDRAM), a double data rate synchronous dynamicrandom access memory (DDR SDRAM), an enhanced synchronous dynamic randomaccess memory (ESDRAM), a synchronous link dynamic random access memory(SLDRAM), and a direct rambus random access memory (DR RAM).

In this application, “at least one” means one or more, and “a pluralityof” means two or more. The term “and/or” describes an associationrelationship between associated objects and may indicate threerelationships. For example, A and/or B may indicate the following cases:Only A exists, both A and B exist, and only B exists, where A and B maybe singular or plural. The character “/” generally indicates an “or”relationship between the associated objects. “At least one item (piece)of the following” or a similar expression thereof means any combinationof these items, including any combination of singular items (pieces) orplural items (pieces). For example, at least one (piece) of a, b, or cmay indicate: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c may besingular or plural.

It should be understood that “one embodiment” or “an embodiment”mentioned in the whole specification means that particular features,structures, or characteristics related to the embodiment are included inat least one embodiment of the present disclosure. Therefore, “in oneembodiment” or “in an embodiment” appearing throughout the entirespecification does not necessarily refer to a same embodiment. Inaddition, these particular features, structures, or characteristics maybe combined in one or more embodiments in any appropriate manner. Itshould be understood that sequence numbers of the foregoing processes donot mean execution sequences in various embodiments of the presentdisclosure. The execution sequences of the processes should bedetermined based on functions and internal logic of the processes andshould not be construed as any limitation on the implementationprocesses of the embodiments of the present disclosure.

Terms such as “part”, “module”, and “system” used in this specificationare used to indicate computer-related entities, hardware, firmware,combinations of hardware and software, software, or software beingexecuted. For example, a part may be, but is not limited to, a process,processor, object, executable file, thread of execution, program, and/orcomputer that runs on a processor. As shown in figures, both a computingdevice and an application running on a computing device may be parts.One or more parts may reside within a process and/or a thread ofexecution, and the part may be located on one computer and/ordistributed between two or more computers. In addition, these parts maybe executed from various computer-readable media that store various datastructures. For example, the parts may communicate by using a localand/or remote process and based on, for example, a signal having one ormore data packets (for example, data from two parts interacting withanother part in a local system, a distributed system, and/or across anetwork such as the internet interacting with other systems by using thesignal).

It should be understood that, first, second, and various numericalsymbols are for distinguishing only for ease of description, and are notused to limit a scope of the embodiments of this application.

It should be understood that the term “and/or” in this specificationdescribes only an association relationship for describing associatedobjects and represents that three relationships may exist. For example,A and/or B may represent the following three cases: Only A exists, bothA and B exist, and only B exists. A or B exists separately, and aquantity of A or B is not limited. In an example in which only A exists,it may be understood that there is one or more As.

A person of ordinary skill in the art may be aware that, in combinationwith the examples described in the embodiments disclosed in thisspecification, units and algorithm steps may be implemented byelectronic hardware or a combination of computer software and electronichardware. Whether the functions are performed by hardware or softwaredepends on particular applications and design constraint conditions ofthe technical solutions. A person skilled in the art may use differentmethods to implement the described functions for each particularapplication, but it should not be considered that the implementationgoes beyond the scope of this application.

It may be clearly understood by the person skilled in the art that, forthe purpose of convenient and brief description, for a detailed workingprocess of the foregoing system, apparatus, and unit, refer to acorresponding process in the foregoing method embodiments, and detailsare not described herein again.

In the several embodiments provided in this application, it should beunderstood that the disclosed system, apparatus, and method may beimplemented in another manner. For example, the apparatus embodimentsdescribed above are merely examples. For example, division into theunits is merely logical function division, and may be other division inactual implementation. For example, a plurality of units or componentsmay be combined or integrated into another system, or some features maybe ignored or not performed. In addition, the displayed or discussedmutual couplings or direct couplings or communication connections may beimplemented through some interfaces. The indirect couplings orcommunication connections between the apparatuses or units may beimplemented in electronic, mechanical, or other forms.

The units described as separate parts may or may not be physicallyseparate, and parts displayed as units may or may not be physical units,may be located in one position, or may be distributed to a plurality ofnetwork units. Some or all of the units may be selected based on actualrequirements to achieve the objectives of the solutions of theembodiments.

In addition, function units in the embodiments of this application maybe integrated into one processing unit, or each of the units may existalone physically, or two or more units are integrated into one unit.

When the functions are implemented in a form of a software function unitand sold or used as an independent product, the functions may be storedin a computer-readable storage medium. Based on such an understanding,the technical solutions of this application essentially, or the partcontributing to the prior art, or some of the technical solutions may beimplemented in a form of a software product. The software product isstored in a storage medium and includes several instructions forinstructing a computer device (which may be a personal computer, aserver, or a network device) to perform all or some of the steps of themethod described in the embodiments of this application. The foregoingstorage medium includes: any medium that can store program code, such asa USB flash drive, a removable hard disk, a read-only memory (ROM), arandom access memory (RAM), a magnetic disk, or an optical disc.

The foregoing descriptions are merely specific implementations of thisapplication, but are not intended to limit the protection scope of thisapplication. Any variation or replacement readily figured out by theperson skilled in the art within the technical scope disclosed in thisapplication shall fall within the protection scope of this application.Therefore, the protection scope of this application shall be subject tothe protection scope of the claims.

1. A signal processing method, comprising: determining a first sequence{x(n)} based on a preset condition, wherein the preset condition is${x_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$ wherein alength of the first sequence is K=6, A is a non-zero complex number, andj=√{square root over (−1)}, and wherein a sequence {s(n)} is {7, 5, −1,−7, −3, 1}; generating a reference signal of a first signal, wherein thefirst signal is a signal modulated by using π/2 binary phase shiftkeying (BPSK), and the reference signal is generated by using the firstsequence; and sending the reference signal on a first frequency-domainresource, wherein the first frequency-domain resource comprises Ksubcarriers each having a subcarrier number of k, andk=u+L×n+delta, wherein L is an integer greater than or equal to 2,delta∈{0, 1, . . . , L−1}, u is an integer, and subcarrier numbers ofthe K subcarriers are numbered in ascending or descending order offrequencies.
 2. The method according to claim 1, wherein a modulationscheme of the first sequence is neither BPSK modulation nor π/2 BPSKmodulation.
 3. The method according to claim 1, wherein the firstsequence is a sequence modulated by using any one of 8PSK, 16PSK, or32PSK.
 4. The method according to claim 1, wherein the method furthercomprises: determining the first sequence in a first sequence group,wherein the first sequence group is one of a plurality of sequencegroups, and wherein the first sequence is determined, based on a valueof the delta, in a plurality of sequences that are in the first sequencegroup and whose length is K.
 5. The method according to claim 4, whereinthe method further comprises: determining the first sequence group basedon a cell identifier or a sequence group identifier.
 6. The methodaccording to claim 4, wherein the method further comprises: receivingindication information, wherein the indication information is used toindicate a sequence that is in each sequence group of at least twosequence groups and is used to generate the reference signal.
 7. Themethod according to claim 1, wherein when the value of the delta is 0,the generating a reference signal of a first signal comprises:performing discrete Fourier transform on elements in a sequence {z(t)}to obtain a sequence {f(t)} with t=0, . . . , L×K−1, wherein when t=0, .. . , L×K−1, z(t)=x(t mod K), and wherein x(t) represents the firstsequence; and mapping elements numbered L×K+delta in the sequence {f(t)}to subcarriers each having the subcarrier number of u+L×p+delta,respectively, to generate the reference signal, wherein p=0, . . . ,K−1.
 8. The method according to claim 7, wherein the performing discreteFourier transform on elements in a sequence {z(t)} to obtain a sequence{f(t)} comprises: performing the discrete Fourier transform on thesequence {z(t)}; and filtering a sequence obtained after the discreteFourier transform to generate the sequence {f(t)}.
 9. The methodaccording to claim 1, wherein when the value of the delta is 1, thegenerating a reference signal of a first signal comprises: performingdiscrete Fourier transform on elements in a sequence {z(t)} to obtain asequence {f(t)} with t=0, . . . , L×K−1, wherein when t=0, . . . , K−1,z(t)=x(t), and wherein when t=0, . . . , L×K−1, z(t)=−x(t mod K), andx(t) represents the first sequence; and mapping elements numberedL×p+delta in the sequence {f(t)} to subcarriers each having thesubcarrier number of u+L×p+delta, respectively, to generate thereference signal, wherein p=0, . . . , K−1.
 10. The method according toclaim 1, wherein when L=4, the generating a reference signal of a firstsignal comprises: performing discrete Fourier transform on elements in asequence {z(t)} to obtain a sequence {f(t)} with t=0, . . . , 4K−1,wherein when t=0, 1, . . . , 4K−1,${{z(t)} = {{w_{delta}\left( \left\lfloor \frac{t}{K} \right\rfloor \right)}{x\left( {t\mspace{14mu}{mod}\mspace{14mu} K} \right)}}},$and wherein w₀=(1, 1, 1, 1), w₁=(1, j, −1, −j), w₂=(1, −1, 1, −1), w₃(1, −j, −1, j), └c┘ represents rounding down of c, and x(t) representsthe first sequence; and mapping elements numbered 4p+delta in thesequence {f(t)} to subcarriers each having the subcarrier number ofu+L×p+delta, respectively, to generate the reference signal, whereinp=0, . . . , K−1.
 11. The method according to claim 1, wherein thegenerating a reference signal of a first signal comprises: performingdiscrete Fourier transform on elements in a sequence {x(t)} to obtain asequence {f(t)} with t=0, . . . , K−1, wherein x(t) represents the firstsequence; and mapping elements numbered p in the sequence {f(t)} tosubcarriers each having the subcarrier number of u+L×p+delta,respectively, to generate the reference signal, wherein p=0, . . . ,K−1.
 12. A signal processing apparatus, comprising: at least oneprocessor; one or more memories coupled to the at least one processorand storing programming instructions for execution by the at least oneprocessor to: determine a first sequence {x(n)} based on a presetcondition wherein the preset condition is${x_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$ wherein alength of the first sequence is K=6, A is a non-zero complex number, andj=√{square root over (−1)}, and wherein a sequence {s(n)} is {7, 5, −1,−7, −3, 1}; and generate a reference signal of a first signal, whereinthe first signal is a signal modulated by using π/2 binary phase shiftkeying (BPSK), and the reference signal is generated by using the firstsequence; and a transceiver, the transceiver configured to send thereference signal on a first frequency-domain resource, wherein the firstfrequency-domain resource comprises K subcarriers each having asubcarrier number of k, andk=u+L×n+delta, wherein L is an integer greater than or equal to 2,delta∈{0, 1, . . . , L−1}, u is an integer, and subcarrier numbers ofthe K subcarriers are numbered in ascending or descending order offrequencies.
 13. The apparatus according to claim 12, wherein amodulation scheme of the first sequence is neither BPSK modulation norπ/2 BPSK modulation.
 14. The apparatus according to claim 12, whereinthe first sequence is a sequence modulated by using any one of 8 PSK, 16PSK, or 32 PSK.
 15. The apparatus according to claim 12, wherein theprogramming instructions are for execution by the at least one processorto determine the first sequence in a first sequence group, wherein thefirst sequence group is one of a plurality of sequence groups, andwherein the first sequence is determined, based on a value of the delta,in a plurality of sequences that are in the first sequence group andwhose length is K.
 16. The apparatus according to claim 15, wherein theprogramming instructions are for execution by the at least one processorto determine the first sequence group based on a cell identifier or asequence group identifier.
 17. The apparatus according to claim 15,wherein the transceiver is further configured to receive indicationinformation, and wherein the indication information is used to indicatea sequence that is in each sequence group of at least two sequencegroups and is used to generate the reference signal.
 18. The apparatusaccording to claim 12, wherein when the value of the delta is 0, theprogramming instructions are for execution by the at least one processorto: perform discrete Fourier transform on elements in a sequence {z(t)}to obtain a sequence {f(t)} with t=0, . . . , L×K−1, wherein when t=0, .. . , L×K−1, z(t)=x(t mod K), and wherein x(t) represents the firstsequence; and map elements numbered L×K+delta in the sequence {f(t)} tosubcarriers each having the subcarrier number of u+L×p+delta,respectively, to generate the reference signal, wherein p=0, . . . ,K−1.
 19. The apparatus according to claim 18, wherein the performingdiscrete Fourier transform on elements in a sequence {z(t)} to obtain asequence {f(t)} comprises: performing the discrete Fourier transform onthe sequence {z(t)}; and filtering a sequence obtained after thediscrete Fourier transform to generate the sequence {f(t)}.
 20. Theapparatus according to claim 12, wherein when the value of the delta is1, the programming instructions are for execution by the at least oneprocessor to: perform discrete Fourier transform on elements in asequence {z(t)} to obtain a sequence {f(t)} with t=0, . . . , L×K−1,wherein when t=0, . . . , K−1, z(t)=x(t), and wherein when t=0, . . . ,L×K−1, z(t)=−x(t mod K), and x(t) represents the first sequence; and mapelements numbered L×p+delta in the sequence {f(t)} to subcarriers eachhaving the subcarrier number of u+L×p+delta, respectively, to generatethe reference signal, wherein p=0, . . . , K−1.
 21. The apparatusaccording to claim 12, wherein when L=4, the programming instructionsare for execution by the at least one processor to: perform discreteFourier transform on elements in a sequence {z(t)} to obtain a sequence{f(t)} with t=0, . . . , 4K−1, wherein when t=0, 1, . . . , 4K−1,${{z(t)} = {{w_{delta}\left( \left\lfloor \frac{t}{K} \right\rfloor \right)}{x\left( {t\mspace{14mu}{mod}\mspace{14mu} K} \right)}}},$and wherein w₀=(1, 1, 1, 1), w₁=(1, j, −1, −j), w₂=(1, −1, 1, −1),w₃=(1, −j, −1, j), └c┘ represents rounding down of c, and x(t)represents the first sequence; and map elements numbered 4p+delta in thesequence {f(t)} to subcarriers each having the subcarrier number ofu+L×p+delta, respectively, to generate the reference signal, whereinp=0, . . . , K−1.
 22. The apparatus according to claim 12, wherein theprogramming instructions are for execution by the at least one processorto: perform discrete Fourier transform on elements in a sequence {x(t)}to obtain a sequence {f(t)} with t=0, . . . , K−1, wherein x(t)represents the first sequence; and map elements numbered p in thesequence {f(t)} to subcarriers each having the subcarrier number ofu+L×p+delta, respectively, to generate the reference signal, whereinp=0, . . . , K−1.
 23. A non-transitory computer-readable storage mediumcomprising instructions which, when executed by at least one processor,cause the at least one processor to perform operations comprising:determining a first sequence {x(n)} based on a preset condition, whereinthe preset condition is${x_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$ wherein alength of the first sequence is K=6, A is a non-zero complex number, andj=√{square root over (−1)}, and wherein a sequence {s(n)} is {7, 5, −1,−7, −3, 1}; generating a reference signal of a first signal, wherein thefirst signal is a signal modulated by using π/2 binary phase shiftkeying (BPSK), and the reference signal is generated by using the firstsequence; and sending the reference signal on a first frequency-domainresource, wherein the first frequency-domain resource comprises Ksubcarriers each having a subcarrier number of k, andk=u+L×n+delta, wherein L is an integer greater than or equal to 2,delta∈{0, 1, . . . , L−1}, u is an integer, and subcarrier numbers ofthe K subcarriers are numbered in ascending or descending order offrequencies.
 24. The non-transitory computer-readable storage mediumaccording to claim 23, wherein a modulation scheme of the first sequenceis neither BPSK modulation nor π/2 BPSK modulation.
 25. Thenon-transitory computer-readable storage medium according to claim 23,wherein the first sequence is a sequence modulated by using any one of8PSK, 16PSK, or 32PSK.
 26. The non-transitory computer-readable storagemedium according to claim 23, wherein the generating a reference signalof a first signal comprises: performing discrete Fourier transform onelements in a sequence {x(t)} to obtain a sequence {f(t)} with t=0, . .. , K−1, wherein x(t) represents the first sequence; and mappingelements numbered p in the sequence {f(t)} to subcarriers each havingthe subcarrier number of u+L×p+delta, respectively, to generate thereference signal, wherein p=0, . . . , K−1.
 27. A signal processingmethod, comprising: generating a local sequence, wherein the localsequence is a first sequence {x(n)} or a conjugate transpose of thefirst sequence, the local sequence is used to process a first signal,and the first signal is a signal modulated by using π/2 binary phaseshift keying (BPSK), wherein the first sequence {x(n)} meets a presetcondition x_(n)=y_((n+M) mod K),${y_{n} = {A \cdot e^{\frac{j \times \pi \times s_{n}}{8}}}},$ whereinM∈{0, 1, 2, . . . , 5}, a length of the first sequence is K=6, A is anon-zero complex number, and j=√{square root over (−1)}, and wherein asequence {s(n)} comprises at least one of the following sequences: {1,−3, 1, 5, −1, 3}, {1, −3, 1, −7, 7, −5}, {1, 5, 1, −5, −1, −3}, {1, 5,1, −3, 1, 5}, {1, 7, 1, −5, −7, −1}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −1,3, 7}, {1, −3, 1, −5, −1, 3}, {1, −3, 1, 5, 3, 7}, {1, 5, 3, 7, −1, −5};and receiving a reference signal of the first signal on a firstfrequency-domain resource, wherein the first frequency-domain resourcecomprises K subcarriers each having a subcarrier number of k,k=u+L×n+delta, n=0, 1, . . . , K−1, L is an integer greater than orequal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, the subcarriernumbers are numbered in ascending or descending order of frequencies,and the reference signal is generated by using the first sequence, andwherein the first sequence varies as a value of the delta varies. 28.The method according to claim 27, wherein the method further comprises:transmitting indication information, wherein the indication informationis used to indicate a sequence that is in each sequence group of atleast two sequence groups and is used to generate the reference signal.29. The method according to claim 28, wherein the first sequence is in afirst sequence group, the first sequence group is one of a plurality ofsequence groups, and the value of the delta is associated with the firstsequence.
 30. The method according to claim 28, wherein the firstsequence is in a first sequence group, and the first sequence group isassociated with a cell identifier or a sequence group identifier.